Science Final 2 Flashcards by Claire Conlon

Typically, atoms gain or lose electrons to achieve...
A. An exchange of energy
B. ionization
C. A stable electron configuration
D. Vaporization

C. A stable electron configuration

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Which of the following groups contain 3 elements with stable electron configuration?
A. Lithium, krypton, argon
B. argon, neon, barium
C. Xenon, neon, boron
D. Helium, xenon, neon

D. Helium, xenon, neon

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Ionization energies tend to…
A. Decrease from left to right across period
B. increase from top to bottom in group
C. Increase from left to right across period
D. Decrease from the bottom of a group to the top

C. Increase from left to right across a period

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The formation of an ionic bond involves the 
A. Transfer of electrons
B. transfer of neutrons
C. Transfer of protons
D. Sharing of electrons

A. Transfer of electrons

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When 2 atoms of the same nonmetal react, they often form a
A. Ionic bond
B. poly atomic ion
C. Diatomic molecule
D. Polar molecule

C. Diatomic molecule

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An element that loses 1 valence electron would have a \_\_\_ charge
A. 1
B. -1
C. 7
D. -7

A. 1+

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In an electron dot diagram, the dots represent
A. All the elements electrons
B. the nucleus
C. The valence electrons
D. Nucleus and inner energy levels

C. The valence electrons

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Which type of elements will form an ionic bond
A. Metals with metals
B. nm with nm
C. Metals with nm
D. None

C. Metals with nonmetals

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Which type of element will form a covalent bond?
A. Metals with metals
B. nm with nm
C, metals with nm
D. None

B. nm with nm

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Which substance would be an example of a polar molecule
A. Oil
B. water
C. Gasoline
D. Grease

B. water

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To clean an oil base paint out of a brush, a person could use
A. Water
B. sugar
C. Acetone
D. Salt

C. Acetone

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The water molecule h2o is polar because it contains two polar single bonds and
A. It’s molecule has a linear shape
B. molecules that contain polar bonds are always polar
C. It’s molecule has a bent shape
D. The attractions between water molecules are strong

C. The molecule has a bent shape

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Every compound has to have an overall \_\_\_ charge
A. Positive
B. negative
C. Neutral
D. Strong

C. Neutral

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The formation of a covalent bond involves the
A, transfer of electrons
B. transfer of neutrons
C. Transfer of protons
D. Sharing of electrons

.d. Sharing of electrons

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Which of the following would be the formula for barium and sulfur forming a compound?
A. BaS
B. ba2S2
C. Ba2S6
D. Ba6s2

A. BaS

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Which of the following would be the formula for sodium and oxygen forming a compound?
A. NaO
B. Na2O
C. NaO2
D. NaO6

B. na2o

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Which of the following would be the formula for magnesium and chlorine forming a compound?
A. MgCl
B. mg2Cl
C. Mg2Cl7
D. MgCl2

D. MgCl2

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Which of the following would be the formula for aluminum and phosphorus forming a compound?
A. AlP
B. Al3P3
C. Al3P5
D. Al5P3

A. AlP

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Which of the following would be the formula for beryllium and nitrogen forming a compound?
A. BeN
B. Be2N5
C. Be2N3
D. Be3N2

D. Be3N2

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Valence electrons are found 
A. In the energy level closest to the nucleus
B. throughout the electron crowd
C. In the outermost energy level
D. In the nucleus

C. In the outermost energy level

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In an electron dot diagram, the elements symbol represents
A. All the elements electrons
B. the nucleus
C. The valence electrons
D. The nucleus and inner energy levels

D. The nucleus and the inner energy levels

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When ionic bonding occurs between two atoms,
A. Only a loss of electrons takes place
B. one atom loses electrons while the other atom gains electrons
C. Only a gain of electrons takes place
D. Electrons are shared equally by the 2 atoms

B. one atom loses electrons while the other atom gains electrons

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Bonding between atoms on the left and right sides of ten periodic table tends to be
A. Covalent
B. ionic
C. Metallic
D. Impossible

B. ionic

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The number of elements that are diatomic is
A. 2
B. 4
C. 7
D. 8

C. 7

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``` The type of chemical bond that joins one or more elements together is determined by A. Atomic mass B. arrangement of electrons C. Arrangement of neutrons D. Total number of electrons ```

B. the arrangement of electrons

``` The maximum number of electrons in the 2nd energy level is A. 1 B. 2 C. 8 D. 18 ```

C. 8

``` An example of a poly atomic ion is A. SO4 B. Ca C. NaCl D. O2 ```

A. SO4

``` Table salt is an example of a A. Ionic bond B. metallic bond C. Covalent bond D. Hydrogen bond ```

A. Ionic bond

Chemical bonding occurs so that atoms can A. Gain electrons B. lose electrons C. Share electrons D. Obtain complete outermost energy levels

D. Obtain complete outermost energy levels

``` Atoms with a low ionization energy A. Lose electrons easily B. gain electrons easily C. Tend to form negative ions D. Tend to remain neutral ```

A. Lose electrons easily

``` When the outermost energy level of an atom contains the maximum number of electrons... A. Ionic bonding occurs B. covalent bonding occurs C. Metallic bonds form D. The atom is stable ```

D. The atom is stable

``` When an atom loses electrons, it... A. Becomes positively charged B. becomes negatively charged C. Obtains a neutral charge D. Will form a metallic bond ```

A. Becomes positively charged

``` What would the name be for N2O4 A. Nitrogen II oxide B. nitrogen II oxide IV C. Binitrogen quad oxide D. Dinitrogen tetroxide ```

D. Dinitrogen tetraoxide

``` The electrical charge on an atom as a whole is A. Neutral B. positive C. Negative D. Dependent in the atomic number ```

A. Neutral

``` The elements most likely to form more than one type of ion are.,. A. Transition metals B. alkali metals C. Halogens D. Alkaline earth metals ```

A. Transition metals

``` The name iron II indicates that a compound contains... A. Iron ions with a +11 charge B. iron ions with a 2+ charge C. Iron ions with a negative charge D. Two types of iron ions ```

B. iron ions with a 2+ charge

``` Which of the following compounds does not contain covalent molecules... A. H2 B. NaCl C. CO2 D. H2O ```

B. NaCl

``` In the name, carbon dioxide, the prefix of the second word indicates the molecule contains... A. 2 carbon atoms B. 2 oxygen atoms C. A poly atomic ion D. An ionic bond ```

B. 2 oxygen atoms

Which statement about metals is true? A.a metal lattice is extremely rigid. B. the bonds within a lattice are weak C. Electrons in a metal lattice are free to move D. Generally, metals have a low melting point

C. Electrons in a metal lattice are free to move

T or F | Brass is an example of an alloy.

True

T or F | Covalent bonds form crystals.

False

T or F | Metals are malleable because of the metallic bonding

True

T or F | The prefix penta represents the numerical value of 6.

T or F | The element written first in an ionic compounds formula has a negative charge

False

T or F | A charged atom is called a molecule

False

T or F | Bromine is an example of a diatomic element

True

T or F | The type of chemical bond formed by an atom is determined by the arrangement of its innermost electrons

False

T or F | An alloy contains at least 2 different metals in a solution

False

T or F | The prefix tetra represents the numerical value of 4

True

T/F | A reactant is formed as a result of a chemical reaction

T/F the rusting of iron is an example of a chemical reacts

T/F if energy is given off as a result of a reaction, the total mass of the reactants will not equal the total mass of the products

T/F subscripts may be changed in order to balance a chemical equation

T/F in a single replacement reaction, an un combined element replaces an element that is part of a compound

T/F in a synthesis reaction, two compounds react to form two new compounds

T/F both exothermic and endothermic reactions require activation energy

T/F catalysts are unchanged after being involved in a chemical reaction

T/F a synthesis reaction is the opposite of a decomposition reaction

T/F one mole is a counting unit equal to 6.02 x 10^23

When a chemical reaction occurs, there is always a change in... A. Energy and mass B. the properties and masses if the reacting substances C. The kinds of atoms involved D. Both the energy and properties of the reacting substance

D. Both the energy and properties if the reacting substance

``` When a chemical reaction occurs, A. Energy is always given off B. new substances are formed C. New atoms are formed D. New atoms and new substances are formed ```

B. new substances are formed

When two substances combine chemically, the properties of the products are A. Different from the properties of the reactants B. the same as the properties of the reactants C. A combination of the properties of the reactants D. Unpredictable

A. Different from the properties if the reactants

Which does not occur as a result of a chemical reaction A. New atoms may form B. molecules may react with other molecules C. Molecules may be broken apart to become atoms D. Atoms may join with other atoms or molecules

A. New atoms may form

What info does a chemical equation give about a chemical reaction... A. The kinds of atoms involved in the reaction B. the numbers of atoms involved in the reaction C. Both the kinds and numbers of atoms involved in the reaction D. None of these

C. Both the kinds and numbers of atoms involved in the reaction

Which of the following gives the correct symbols and formulas for the reaction in which magnesium combines with oxygen? A. Mg+O=MgO2 + energy B. Mg +O2 -> MgO+ energy

B. mg + O2 -> MgO + energy

The law of conservation of mass states that... A. For every reaction, there is an equal and opposite action B. in a chemical reaction the total mass of the reactants must be = to the mass of one of the products C. In a chemical reaction, the total mass of the products must be equal to to the mass of one of the reactants D. In a chemical reaction, the total mass of the reactants must be equal to the total mass of the products

D. In a chemical reaction, the total mass of the reactants must be equal to the total mass of the products

A log is burning in a fireplace. If the amount of oxygen reaching the log is decreased, which of the following statements is true? A. The reaction rate increases B. the reaction rate decreases C. The reaction rate remains the same D. The reaction rate depends only on the temperature

B. the reaction rate decreases

Which of the following is a correctly balanced chemical equation? A. 2H^2 + O^2 -> 2H^2O B. N2 + 3H2 -> NH3

A. 2H2 + O2 -> 2H2O

Which of the following does NOT show the law of conservation of mass? A. 24g of Mg burn in 32g O2 to produce 56g of MgO B. 24mL of Mg burn in 32mL of O2 to produce 56mL of MgO C. 2 atoms of Mg react with 1 molecule of o2 to produce 2 units of MgO D. 1 atom of Mg reacts with one atom of o to produce a unit of MgO that contains two atoms

B. 24 ml of Mg burn in 32 mL of o2 to produce 56mL of MgO

``` Which of the following is a correctly balanced equation describing a decomposition reaction? A. KClO2 -> KCl + O2 B. Cu + AgNO2 -> CuNO3 + Ag C. Fe2O3 -> 2Fe + O2 D. H2CO3 -> H2O + CO3 ```

A. KClO2 -> KCl + O2

``` Which is the correct product for the following double-replacement reaction? 2KI + Pb(NO3)2 -> 2KNO3 + ? A. PbO B. PbO2 C. PbI D. PbI2 ```

D. PbI2

``` Which is the correct product for the following single-replacement reaction? 2Al + Fe2O3 -> ? + 2Fe A. AlO B. AlO3 C. Al2O3 D. Al3O2 ```

C. Al2O3

represents a correctly balanced double-replacement reaction? | C. Ba(NO3)2 + K2SO4 -> BaSO4 + 2KNO3

C. Ba(NO3)2 + K2SO4 -> BaSO4 + 2KNO3

``` In an exothermic reaction... A. Some energy is destroyed B. energy is released C. Energy is taken from the surroundings D. Energy is stored in one or more of the products ```

B. energy is released

``` When a chemical reaction occurs... A. An energy change always occurs B. an energy change occasionally occurs C. Energy is always released D. Energy is always absorbed ```

A. An energy change always occurs

Enzymes increase the rate of chemical reactions in the body by A. Regulating body temperature B. increasing the surface area of the reactants C. Acting as catalysts D. Changing the concentration of the reactants

C. Acting as catalysts

``` Combustion or burning... A. Is always an endothermic reaction B. is always an exothermic reaction C. May be exothermic or endothermic D. Stores energy in the molecules of the reacting substances ```

B. is always an exothermic reaction

As a result of an endothermic reaction... A. The reactants have more energy than the products B. the products have more energy than the reactants C. The reactants and the products have the same amounts of energy D. No energy change occurs

B. the products have more energy than the reactants

``` While performing a chemical reaction, a student touches the sides of their container holding the reactants and notices that it feels very warm. The reaction must be A. A synthesis reaction B. a decomposition reaction C. Endothermic D. Exothermic ```

D. Exothermic

``` In general, increasing the concentration of reactants causes the reaction to occur... A. Faster B. more slowly C. By absorbing energy D. By giving off energy ```

A. Faster

An increase in temperature generally increases reaction rate because high temperature molecules.. A. Move more slowly B. are likely to collide more frequently C. Collide with less energy D. Have more surface area

B. are likely to collide more frequently

A catalyst is a... A. Reactant that speeds up the rate of a reaction B. product that speeds up the rate of a reaction C. Substance that is changed as a result of a chemical reaction D. Substance that lowers the activation energy needed for a reaction

D. Substance that lowers the activation energy needed for a reaction

``` Which of the following will not increase the rate of a chemical reaction? A. Am increase in concentration B. an increase in temperature C. The pressure of a catalyst D. A decrease in surface area ```

D. A decrease in surface area

``` How many grams of HON3 are in 2.6 mol of a compound? A. 24.2 g B. 63.0 g C. 93.0 g D. 163.8 g ```

D. 163.8 g

``` How many moles of Cr are in 156 g of the element? A. 1 mol B. 3 mol C. 6.5 mol D.156 mol ```

B. 3 mol

``` Calculate the molar mass for CO2. A. 28.01 g B. 44.01 g C. 56.02 g D. 72.08 g ```

B. 44.01

``` Calculate the mass, in grams, in 6 moles of C12H22O11 A. 2054.04 g B. 342.34 g C. 57.06g D. 74.02 g ```

A. 2054.04 g

``` Calculate the number of moles in 700 grams of Mg(NO3)2. A. 148.33 mol B. 103831 mol C. 4.72 mol D. 5.21 mol ```

C. 4.72 mol

``` A. Single replacement B. double replacement C. Synthesis D. Decomposition E. combustion ```

Zn + HCl -> ZnCl2 + H2

MgCO3 + HCl -> MgCl2 + H2CO3

FeS + O2 -> Fe2S3 + SO2

HgO -> Hg + O2

H2 + N2 -> NH3

NaCl + AgNO3 -> NaNO3 + AgCl

Na2O + CO2 -> Na2CO3

(NH4)2Cr2O7 -> Cr2O3 + N2 + H2O

NaOH + HCl -> NaCl + H2O

C3H8 + O2 -> CO2 + H2O

``` All movement is compared with a A. Car B. frame of reference C. Tree D. Train ```

B. frame of reference

``` Motion is measured by... A. Distance B. distance and direction C. Time D. Time and distance ```

D. Time and distanc

``` The most commonly used frame if reference is the.. A. Sun B. earth C. Moon D. Ocean ```

B. earth

``` Motion can be measured in... A. Meters B. kilometers C. Seconds/meters D. Meters/second ```

D. Meters/second

``` A Change in position relative to a frame of reference is.. A. Motion B. momentum C. Acceleration D. Direction ```

A. Motion

``` The length between two places is... A. Motion B. distance C. Time D. Speed ```

B. distance

``` The rate at which an object changes position is called... A. Distance B. acceleration C. Speed D. Momentum ```

C. Speed

``` The length of a straight line from the starting point to the ending point is... A. Displacement B. speed C. Acceleration D.mtime ```

A. Displacement

``` Velocity is speed and... A. Motion B. mass C. Distance D. Direction ```

D. Direction

``` If a runner travels 50m in 5 sec, his average speed is... A. 50m/sec B. 5sec/m C. 10 sec/m D. 10m/sec ```

D. 10 m/sec

``` If a motorboat travels 25 km/hr down a river that has a velocity of 4km/hr, what is the boat's actual velocity? A. 21km/hr B. 29km/hr C. 100km/hr D. 6.2km/hr ```

B. 29 km/hr

To calculate velocity, you need to know the total... A. Distance of the motion B. time of the motion C. Distance and time of the motion D. Distance, time, and direction of the motion

D. Distance, time, and direction of the motion

``` The rate of change of velocity is called... A. Speed B. motion C. Momentum D. Acceleration ```

D. Acceleration

To determine speed, you need to know the total... A. Distance of the motion B. time of the motion C. Distance and time of the motion D. Distance, time, and direction of motion

C, distance and time of the motion

``` An object rolls toward the east at a steady speed of 12m/sec for 3 seconds, what distance does it travel? A. 4m B, 36m C. 24m D. 18m E. 4m/sec^2 ```

B. 36m

The velocity of an object changes if... A. It's speed changes B. it's direction changes C. Either it's speed or its direction changes D. Neither it's speed nor its direction changes

C. Either it's speed or its direction changes

``` A unit of length divided by a unit of time describes... A. Speed B. velocity C. Acceleration D. Momentum ```

A. Speed

``` In one half hour, a car traveled 20km. It's average speed was... A. 60km B. 10km/hr C. 40km D. 40km/hr ```

D. 40km/hr

Acceleration can be calculated by... A. Measuring speed and time B. dividing distance by time C. Dividing the change in velocity by the time needed for that change D. Dividing the time needed for a change in velocity by that change in velocity

C. Dividing the change in velocity by the time needed for that change

``` When deceleration occurs, velocity... A. Has decreased B. has increased C. Is un changing D. Has reached zero ```

A. Has decreased

``` An automobile travels 30 m from its starting point in 5 sec. It's average speed is... A. 6m/sec B. 30 m/sec C. 35m/sec D. 150m/sec ```

A. 6 m/sec

``` An example of constantly changing velocity is... A. Average velocity B. constant speed C. Circular motion D. Certain time frame ```

C. Circular motion

``` Movement can be measured only with reference to something that... A. Is assumed to to fixed in place B. moves in the same direction C. Moves in the opposite direction D. Moves with inconsistent speed ```

A. Is assumed to if fixed in place

``` Speed that does not change is called... A. Velocity B. terminal velocity C. Constant speed D. Average speed ```

C. Constant speed

``` Acceleration can be measured in... A. M/sec B. sec C. M/sec/sec D. M ```

C. M/sec/sec

``` Negative acceleration is the same as... A. Terminal velocity B. an increase in speed C. An increase in velocity D. Deceleration ```

D. Deceleration

``` Which of the following is accelerating? A. A car traveling 33 slows to 25 B. a car traveling 33 speeds up to 42 C. A car traveling 35 due north turns east while still traveling 35 D. All of these ```

D. All of these

``` The speedometer on a car indicates the cars ... A. Average speed B. instantaneous speed C. Acceleration D. Deceleration ```

B. instantaneous speed

``` When an object slows down, A. It's velocity changes B. it's speed changes C. It is decelerating D. All of the above changes take place ```

D. All of the above changes take place

``` What is the acceleration of an object that takes 20 sec to change from a speed of 200m/sec to 300 m/sec? A. 5m/sec B. 5m/sec^2 C. 100 m/sec D. 100 m/sec^2 E. -5 m/sec^2 ```

B. 5m/sec^2

``` When two velocities are in the same direction, they are___ to calculate the actual velocity... A. Divided by each other B. subtracted from each other C. Added to each other D. Multiplied by each other ```

C. Added to each other

``` When two velocities are in opposite directions, they are___ to calculate the actual velocity... A. Divided by each other B. subtracted from each other C. Added to each other D. Multiplied to each other ```

B. subtracted from each other

``` A time frame of 43 minutes is equal to... A. 0.012 hr B. 240hr C. 154800 hr D. 0.72 hr ```

D. 0.72 hr

``` The distance-time graph for acceleration is always a ___ line... A. Straight B. curved C. Hill and valley D. None of the above ```

B. curved

``` The distance-time graph for constant speed is always a ___ line... A. Straight B. curved C. Hill and valley D. None of the above ```

A. Straight

``` A passenger in the back seat of a moving car moving at a steady speed is at rest relative to.. A. Side of the road B. pedestrian on the corner C. The front seat of the car D. The wheels of the car ```

C. The front seat of the car

``` A horizontal lie on a distance-time graph means the object is... A. Moving at a constant speed B. moving faster C. Slowing down D. At rest ```

D. At rest

``` A distance time graph indicated that an object moves 100m in 4sec and then remains at rest for 1 sec. What is the average speed of the object? A. 50m/sec B. 25m/sec C. 20m/sec D. 100 m/sec ```

C. 20m/sec

``` An object moving at 30m/sec takes 5sec to come To a stop. What is the objects acceleration? A. 30m/sec^2 B. -30m/sec^2 C. -6m/sec^2 D. 6m/sec^2 ```

C. -6m/sec^2

``` Objects in free fall near the surface of the earth experience... A. Constant speed B. constant velocity C. Constant acceleration D. Constant distance ```

C. Constant acceleration

These next 5 questions correspond with the distance-time graph pics

``` Which figure illustrate an object moving at a constant speed? A. Figure A B. Figure B C. Figure C D. Figure A&B ```

D. Figures A & B

``` In figure A, calculate the average speed between the 8 and 12 second time frame? A. 12.5 m/sec B. 25 m/sec C. 300m D. 100m ```

B. 25m/sec

``` In figure C, calculate the average speed rafter 16 seconds... A. 12.5 m/sec B. 25m/sec C. 21.88m/sec D. 37.5 m/sec ```

C. 21.88 m/sec

``` In figure B, calculate the overall average speed... A. 12.5 m/sec B. 5m/sec C. 200m D. 20sec ```

A. 12.5 m/sec

``` In figure C, calculate the average speed between 12 and 20 seconds... A. 12.5 m/sec B. 25m/sec C. 21.88 m/sec D. 37.5m/sec ```

D. 37.5 m/sec

``` Force is... A. A push B. a pull C. The ability to change motion D, all of these answers ```

D. All of these answers

``` Forces that are opposite and equal are called... A. Balanced B. friction C. Unbalanced D. Gravitational ```

A. Balanced

``` The force that opposes the motion of an object is called... A. Acceleration B. friction C. Density D. Gravity E. inertia ```

B. Friction

``` The type of friction that exists for a shark swimming in the ocean is... A. Sliding B. hydraulic C. Rolling D. Fluid ```

D. Fluid

``` The property of matter that resists a change in motion is... A. Inertia B. friction C. Gravity D. Weight E. acceleration ```

A. Inertia

``` The weight of an object depends on... A. Distance from the earths surface and gravity B. mass and distance from earths surface C. Size and volume D. Mass and height ```

B. mass and distance from earths surface

``` The force of attraction that exists between all objects in the universe is... A. Friction B. inertia C. Momentum D. Gravity ```

D. Gravity

``` A change win the force of gravity pulling on you will change your... A. Mass B. air resistance C. Inertia D. Weight ```

D. Weight

``` Forces can cause objects to... A. Stop moving only B. change direction only C. Start moving only D. Start moving, change direction, or stop moving ```

D. Start moving, change direction, or stop moving

``` A force that sets am object into motion is... A. Balanced B. friction C. Unbalanced D. Inertia ```

C. Unbalanced

The direction of the frictional force on a moving object is.. A. Opposite to the motion of the moving object B. the same as the motion of the moving object C. Not going to alter the acceleration of the moving object D. Never responsible for stopping the motion of that object

A. Opposite to the motion of the moving object

``` Wheels and all bearings change sliding friction to... A. Static B. rolling C. Fluid D. All types of friction ```

B. rolling

``` The function of lubricants is to change... A. Fluid friction to sliding B. fluid friction to rolling C. Sliding friction to fluid D. Sliding friction to rolling ```

C. Sliding friction to fluid friction

``` Treads on tires... A. Increase friction B. reduce friction C. Decrease stopping motion D. Prevent the braking of a car ```

A. Increase friction

``` An example of rolling friction is... A. A stack of cartons being pushed across a floors B. the use of ball bearings C. The fall of a feather through the air D. Sand placed on an icy walk ```

B. the use of ball bearings

An example of friction other than sliding or rolling is... A. Pushing a desk across a floor B. walking across a floor C. Floating downward after diving off a cliff D. Riding on a skateboard

C. Floating downward after diving off a cliff

An example of balanced forces.. A. A person skating back and forth on rink B. tire with treads gaining speed on an icy road C. 2soccer players running in opposite directions D. A book resting on a desk

D. A book resting on a desk

``` The sum of balanced forces equals... A. Zero B. 1 C. 2 D. 3 ```

A. Zero

When a car moves at constant velocity, the... A. Wheels are balanced B. frictional force is greater than the engines force C. Engines force is greater than the frictional force D. Engines force is equal to the frictional force

D. Engines force is equal to the frictional force

``` A standoff in an arm wrestling match is due to.. A. Sliding frictional forces B. rolling frictional forces C. Fluid frictional forces D. Balanced forces ```

D. Balanced forces

``` Forces that are not opposite and equal are... A. Sliding B. rolling C. Balanced D. Unbalanced ```

D. Unbalanced

``` Balanced forces cause... A. A moving particle to slow down B. a moving particle to speed up C. No change in motion D. A change in direction ```

C. No change in motion

``` The combination of two forces exerted in opposite directions is the, A. Sum of the two forces B. difference between the two forces C. product of the two forces D. Ratio of the two forces ```

B. difference between the two forces

If there is an unbalanced force in an arm wrestling match, A. Both arms will move in the direction of the smaller force B. both arms will move in the direction of the larger force C. The arms will move in opposite directions D. The arms will be stationary

B. both arms will move in the direction of the larger force

``` When 2 forces acting in the same direction are applied to a mass, the combined force is the... A. Sums of the two forces B. difference between the two forces C. Product of the two forces D. Ratio of the two forces ```

A. Sum of the two forces

The first law of motion states... A. That object at rest will remain at rest B. that an object in motion will remain in motion at constant velocity C. That an unbalanced force can change the velocity of an object in motion D. All of the above

D. All of the above

``` The law of motion that describes action-reaction is the.. A. 1st law B. 2nd law C. 3rd law D. Universal law of gravity ```

C. 3rd law

``` One newton equals one... A, kg B. kg*m C. Kg* m/sec D. Kg*m/sec^2 ```

D. Kg*m/sec^2

``` Why forces act in pairs is explained by newtons... A. First law of motion B. second law of motion C. Third law of motion D. Universal law of gravity ```

C. Third law of motion

``` A book resting on a desk... A. Has unbalanced forces acting on it B. has weight due to graviton all force C. Exerts no force D. Has weight but not mass ```

B. has weight due to gravitational force

Gravitational force between two objects depends on the.. A. Masses of the objects and the distance between them B. mass if each object only C. Distance between the objects only D. Inertia and masses of the objects

A. Masses of the objects and the distance between them

``` A mass of 5 kg has a weight of... A. 5kg*m/sec^2 B. 5N C. 49 kg *m/sec D. 49N 49 kg*m/sec^2 ```

D. 49 N

``` If you were on the moon, there would be a change in your... A. Weight and mass B. weight C. Mass D. Volume ```

B. weight

``` The attractive force between all objects in the universe is called... A. Inertia B. gravity C. Magnetism D. A push or a pull ```

B. gravity

``` An example of fluid friction is... A. Rolling friction B. sliding friction C. Air resistance D. Produced when two rough surfaces slide against each other ```

C. Air resistance

Which if the following is a true statement? A. Fluid friction occurs in liquids only B. fluid friction is less than sliding friction C. Sliding friction is less than fluid friction D. Fluid friction occurs in gases only

B. fluid friction is less than sliding friction

``` Which scientist stated incorrectly that a force was needed to keep an objects velocity constant when the net force acting on the object was zero? A. Aristotle B. Galileo C. Newton D. Boyle ```

A. Aristotle

``` Which scientist calculated the acceleration of gravity? A. Aristotle B. Galileo C. Newton D. Boyle ```

B. Galileo

``` According to newtons 2nd law, force equals mass times... A. Weight B. velocity C. Acceleration D. Speed ```

C. Acceleration

``` Weight is measured in the metric system in units called... A. Pounds B. kilograms C. M/sec^2 D. Newtons ```

D. Newtons

``` Which of the following is not used to reduce friction? A. Wheels B. ball bearings C. Oil D. Rough surfaces ```

The amount of sliding friction depends on the... A. Weight of the moving object and the type of source that the object slides across B. density and volume of the object C. Acceleration and mass of the object D. Density and mass of the object

A. Weight of the moving object and the type of surface that the object slides across

``` Near the surface of the earth, the acceleration due to gravity is 9.8 m/sec^2. After falling 6 seconds, an object would have a velocity of.. A. 3.8m/sec B. 9.8 m/sec C. 15.8m/sec D. 58.8 m/sec ```

D. 58.8 m/sec

``` Motion when an unbalanced force acts on an object is described is described by newtons... A. 1st law B. 2nd law C. 3rd law D. Law of universal gravitational ```

B. 2nd law

No force is necessary to... A. Start an object moving B. stop an object from moving C. Cause a change in the motion of an object D. Keep an object doing what it is already doing

D. Keep an object doing what it is already doing

``` As the distance between 2 objects decreases, the force of gravity between the objects... A. Increases B. decreases C. Remains the same D. Increases then decreases ```

A. Increases

``` The forces acting on a falling leaf are... A. Air resistance and fluid friction B. gravity and air resistance C. Gravity and static friction D. Weight and rolling friction ```

B. gravity and air resistance

``` Newtons law of universal gravitation states that all objects in the universe attract each other by the force of... A. Gravity B. friction C. Inertia D. Force ```

A. Gravity

As you push a cereal box across a tabletop the sliding friction acting on the cereal box... A. Acts in the direction of motion B. equals the weight of the box C. Is usually greater than static friction D. Acts in the direction opposite of motion

D. Acts in the direction opposite of motion

``` An open parachute increases air resistance of a falling sky diver by... A. Decreasing the weight of the diver B. increasing surface area C. Increasing the terminal velocity D. Reducing fluid friction ```

B. increasing surface area

``` To find pressure, you must know the.. A. Weight and volume B. force and area C. Mass and area D. Force and mass ```

B. force and area

One reason air pressure increases at lower altitudes is because... A. There are fewer air particles in a given area B. there are more particles in a given area C. The air particles have more mass D.the air particles have less mass

There are more air particles in a given area

``` Fluids are.. A. Liquids, gases, and solids B. either liquids or gases C. Liquids D. Either solids or gases ```

B. either liquids or gases

``` The brake system on a car is an example of an... A. Hydraulic device B. simple machine C. Lever D. Inclined plane ```

A. Hydraulic device

``` What is the pressure it a force of 200N is applied over an area of 50cm^2? A. 4 N/cm^2 B. 0.24 N/cm^2 C. 10000 N/cm^2 D. 150 N/Cm^2 ```

A. 4 N/cm^2

When the area over which pressure is applied is increased... A. The pressure decreases B. the force on that are increases C. The pressure increases D. The pressure first increases and then decreases

A. The pressure decreases

``` The buoyant force exerted by a fluid can be... A.greater than the weight of the object B. less than the weight of the object C. The same as the weight of the object D. All of the above ```

D. All of the above

The pressure in a moving stream of fluid... A. Is greater than the pressure in the surrounding fluid B. is less than the pressure in the surrounding fluid C. Depends on the nature of the fluid D. Depends on the volume of the fluid

B. is less than the pressure in the surrounding fluid

An airplane wing is designed to make the air move... A. At the same speed over the top as under the bottom B. slower over the top than under the bottom C. Faster over the top than under the bottom D. Slower over the top as well as under the bottom

C. Faster over the top than under the feeling

An object floats because it displaces a weight of fluid... A. Equal to or greater than its own weight B. equal to its volume C. Less than its own weight D. With a density greater than 1 g/cm^3

A. Equal to or greater than its own weight

``` Pressure is force... A. Divided by mass B. divided by area C. Times mass D. Times area ```

B. divided by area

``` Pressure is measured in which of the following units A. N/cm^2 B. n/cm^3 C. N D. Cm2/N E. lbs ```

A. N/cm^2

At high altitudes, there are A. More particles of air B. fewer particles of air

B. fewer particles of area

``` Fluid pressure increases as... A. Altitude increases B. altitude and depth increase C. Depth increases D. Depth decreases ```

C. Depth increases

``` The direction of fluid pressure is... A. Upward B. downward C. Toward the sides D. In all directions ```

D. In all directions

The direction of the buoyant force on an object placed in a fluid is... A. Unrelated to other forces on that object B. opposite to the gravitational force on that object C. In the same direction as the gravitational force on the object D. In the same direction as the weight of the object

B. opposite to the gravitational force on that object

``` Archimedes principle applies to... A. Submerged objects only B. liquids and gases C. Floating objects only D. Liquids only ```

B. liquids and gases

According to Archimedes principle, the buoyant force on an object is... A. Always greater than the weight of a submerged object B. greater than the weight of the displaced fluid C. Equal to the weight of the displaced fluid D. Less than the weight of the displaced fluid

C. Equal to the weight of the displaced fluid

An object will float in a fluid if the density of the fluid is... A. Greater than the density of the object B. less than the density of the object C. Equal to or less than the density of the object D. Unrelated to either the mass or the volume of the object

A. Greater than the density if the object

``` The density of water is... A. 1 g B. 1 cm3 C. 1g/cm3 D. 1 cm3/g ```

C. 1.0 g/cm3

When a submarine sinks, A. It's weight is greater than the weight of the displaced water B. It's weight is less than the weight of the displaced water C. It's weight is equal to weight of the displaced water D. It's weight is less than the buoyant force

A. It's weight is greater than the weight of the displaced water

Although the density of steel is 7.8 g/cm3, a steel cruise ship floats because... A. Most of the ship is steel, but part is water B. the total density of the steel, air, and load is less than the density of water C. the total density of the steel, air, and load is greater than the density of water D. the total density of the air and load is equal to the density of steel

B. the total density of the steel, air, and load is less than the density of water

``` A pressure of 10 N/m2 equals... A. 1pa B. 10 pa C. 100 pa D. 1000 pa ```

B. 10 pa

``` If 51 g of a substance takes up 75cm^3 of space, the density of the substance is... A. 1.47 g/cm3 B. 0.68 g/cm3 C. 1.47 cm3/ g D. 0.68 cm3/g ```

B. 0.68 g/cm3

``` The principle applied to the design of an airplane wing was developed by... A. Archimedes B. Bernoulli C. Newton D Boyle ```

B. Bernoulli

``` The faster a fluid moves, the... A. Less pressure it exerts B. more pressure it exerts C. Less is its density D. Greater is its density ```

A. Less pressure it exerts

Because the density of salt water is greater than that of fresh water, a ship will... A. Float higher in salt water than in fresh water B. float higher in fresh water than in salt water C. Be submerged more rapidly in salt water than in an equal amount of fresh water D. Require more salt water than fresh water to equal it's height

A. Float higher in salt water than in fresh water

``` The pressure of air at sea level is approximately... A. 0kpa B. 10kpa C. 101kpa D. 1000kpa ```

C. 101 map

Buoyancy is... A. The tendency of objects to sink in fluids B. the force of a fluid that pushes an object up C. A force in the same direction as gravity D. Caused by the fact that objects have less mass in a fluid

B. the force of a fluid that pushes an object up

``` An object will float in water if its density is... A. 0.8 g/cm3 B. 1.1 g/cm3 C. 2 g/cm3 D. 1.5 g/cm3 ```

A. 0.8 g/cm3

``` What is the pressure if a force of 20 N is exerted over an area of 10cm2? A. 2N/cm2 B. 10N/cm2 C. 20N/cm2 D. 200 N/cm2 ```

A. 2N/cm2

``` What is the force exerted on a surface measuring 1000 cm2 if the pressure is 2N/cm2? A. 500n B. 500cm C. 2000N D. 2000cm ```

C. 2000 N

Which of the following would cause an increase in pressure? A. Increasing the area without changing force B. decreasing the area without changing force C. Decreasing the force without changing area D. Decreasing both force and area by the same amount

B. decreasing the area without changing force

Hydraulic devices apply a small force over a small area to... A. Ensure that the pressure is equal in all directions B. produce a large force over a area C. Increase pressure D. Produce a large force over a small area

B. produce a large force over a area

``` The pressure exerted by a fluid is due to the motion of its particles and the... A. Downward pull of gravity on them B. volume of the substance C. Color of the substance D. Friction of the substance ```

A. Downward pull of gravity on them

``` A submarine submerges by... A. Taking in more water B. decreasing its speed C. Decreasing its density D. Decreasing its mass ```

A. Taking in more water

Fluids will move... A. From areas of higher pressure to areas of lower pressure B. from areas of lower pressure to areas of higher pressure C. Both D. Neither

A. From areas of higher pressure to areas of lower pressure

``` Density =... A. V/m B. m*v C. M/v D. V-m ```

C. M/v

``` A brick weighs 21N. Measured underwater, it weighs 12N. What is the size of the buoyant force exerted by the water on the brick? A.33n B. 21n C. 12n D. 9n ```

``` The strength of the buoyant force acting on an object in a fluid depends on the objects... A. Mass B. surface area C. Volume D. Weight ```

C. Volume

``` The buoyant force on an object in a fluid is equal to the weight of the... A. Fluid B. fluid surrounding the object C. Fluid displaced by the object D. Object ```

C. Fluid displaced by the object

Where is the fluid pressure the greatest? A. 30cm below surface of pool B. 1m below the surface of the pool C. 2m below the surface of a pool D. The pressure is the same in all parts of a swimming pool

C. 2m below the surface of a pool

``` The operation of a hydraulic lift system is explained by... A. Archimedes principle B. Bernoulli's principle C. Newtons principle D. Pascals principle ```

D. Pascals principle

``` Specific gravity is a number that compares the density of an object to the density of... A. Air B. water C. Salt water D. Fluids E. objects weight ```

B. water

T-F | The upward buoyant force of a fluid opposes the downward force of gravity on an object.

Fluids exert pressure because their particles have weight, although they are motionless.

Subs could be crushed due to the increase in fluid pressure at certain ocean depths.

The buoyant force on an object is equal to the weight of the fluid displaced by the object.

Buoyancy determined whether an object sinks or floats in fluids.

A hydraulic lift transmits fluid pressure in different amounts in different directions

The total area of both pistons in a hydraulic lift is the same.

The particles in fluids are tightly packed together.

As depth in a fluid increases, the pressure it exerts decreases.

The relationship between buoyancy and the weight of a displaced fluid is called Archimedes principle

Using the periodic table, write the formulas for these 6

Zn and F

ZnF2

Al and O

Al2O3

Al and Br

AlBr3

C and S

CS2

Ba and N

Ba3N2

Li and Se

Li2Se

Using the oxidation chart, write the formulas (1-4) and the names(5-8)

Calcium hydroxide

Ca(OH)2

Magnesium carbonate

MgCO3

Lead(IV)Chromate

Pb(CrO4)2

Cadmium nitrite

Cd(NO2)2

Cu2O

Copper(I)oxide

BaCl2

Barium chloride

PbO

Lead(II)Oxide

Cu(NO3)2

Copper(II)Nitrate

Science Final 2 Flashcards

(265 cards)