Science: Physical Science

Question 1

Atoms with:

More protons than electrons are called:

More electrons than protons are called:

Answer 1

Cations

Anions

Question 2

Locations:

Protons
Neutrons
Electrons

Answer 2

Protons - nucleus
Neutrons - nucleus

Electrons - orbit the nucleus

Question 3

Atomic mass =

Answer 3

Protons + neutrons

Question 4

Atomic number =

Answer 4

Number of protons in nucleus

Question 5

Two or more atoms joined together

Answer 5

Molecule

Question 6

Atoms share one or more valence electrons

Answer 6

Covalent bond

Question 7

Chemical bond that involves the attraction btwn two ions with unlike charges

Answer 7

Ionic bond

Question 8

Loosely packed molecules-can change shape but not volume

Answer 8

Liquids

Question 9

Molecules widely dispersed - change both shape and volume

Answer 9

Gas

Question 10

Contains freely moving charged particles, but overall charge is neutral

Answer 10

Plasma

Question 11

Liquid to gas:
Gas to liquid:
Solid to gas:
Gas to solid:

Answer 11

Liquid to gas: evaporate
Gas to liquid: condensation
Solid to gas: sublimation
Gas to solid: deposition

Question 12

Substances combined without a chemical reaction

When distribution is uniform (salt water) the mixture is called:

Answer 12

Mixture

Solution

Question 13

Chemical reaction: energy ( heat is released):

Chemical reaction: energy is required for the reaction to take place

Answer 13

Exothermic

Endothermic

Question 14

Chemical change substance loses electrons when exposed to oxygen ( iron rusts)

Answer 14

Oxidation

Question 15

Chemical reaction that produces heat, carbon dioxide and water

Answer 15

Combustion

Question 16

Two substances combine to form a single substance

Answer 16

Synthesis

Question 17

Chemical reaction in which a single substance is broken down into two or more substances

Answer 17

Decomposition

Question 18

Chemical reaction when an acid and a base react to produce a salt and a water

Answer 18

Neutralization

Question 19

_ stays the same wherever the object is located ( ex: earth and moon)

Answer 19

Mass

Question 20

Mass divided by volume =

Amount of space the object occupies

Answer 20

Density

Question 21

Amount of solute that will dissolve in a solvent

Poor conductors

Answer 21

Solubility

Insulators

Question 22

_ compounds that contribute a hydrogen ion when in a solution

_ compounds that contribute a hydroxide ion in a solution

Answer 22

Acid

Bases

Question 23

Speed =

Answer 23

Distance /time

Question 24

Vector measures:

2

Answer 24

Magnitude and direction

Displacement, velocity, acceleration

Question 25

Scale measures:

Answer 25

Magnitude only

Question 26

Measures shortest distance btwn initial and final locations of a moving point

Answer 26

Displacement

Question 27

Rate at which a an object changes position

Equation:

Answer 27

Velocity

Displacement/ time

Question 28

_ describes how quickly an object changes velocity

Equation:

Answer 28

Acceleration

Change in velocity/ time

Question 29

Newton’s 1st law

Answer 29

An object at rest stays at rest and an object in motion stays in motion unless acted on by a force

Question 30

Newton’s 2nd law

Answer 30

Force is equal to the mass of an object multiplied by its acceleration

F= ma

Question 31

Newton’s 3rd law

Answer 31

for every action there is an qual and opposite reaction

Question 32

Force that results from objects being pulled or hung

Upward force of object resting on another object

Answer 32

Tension

Normal force