1st Semester test

Question 0

The prefix kilo Means

Answer 0

1000

Question 1

What involves the study of matter and it’s motion through space and time

Answer 1

Physics

Question 2

The correct symbol for the SI unit of temp is

Answer 2

(K) kelvin

Question 3

The SI unit that is used to measure time is

Answer 3

Second

Question 4

The variable plotted on the horizontal or x Axis is called

Answer 4

Independent variable

Question 5

How many meter are there in 1865 cm

Answer 5

18.65

Question 6

The best type of graph to use to show how some fixed quantity is broken Down into parts is

Answer 6

Circle graph

Question 7

A beaker contains .32L of water what is the volume of this water in milliliters

Answer 7

320mL

Question 8

Another term for technology is

Answer 8

Applied science

Question 9

The process if gathering information through the senses is called

Answer 9

Observation

Question 10

When designing an experiment the first step is to

Answer 10

State the problem

Question 11

A factor manipulated in an experiment to change the dependent variable is the

Answer 11

Independent variable

Question 12

A rule or principle that describes what happens in nature is _____

Answer 12

Scientific law

Question 13

What is a system of knowledge and the methods used do find that knowledge

Answer 13

Science

Question 14

An explanation of an event that is based on repeated observations and experiments is a _______

Answer 14

Theory

Question 15

The building blocks of matter

Answer 15

Atoms

Question 16

An idea, event, or object can be represented by a _______ to help people better understand it

Answer 16

Model

Question 17

A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the _____

Answer 17

Control

Question 18

A factor in an experiment that change from the manipulation of the independent variable is the_______

Answer 18

Dependent variable

Question 19

A factor that does not change in the experiment

Answer 19

Constant

Question 20

Motion is a change in

Answer 20

Position

Question 21

3 m/s north is an example of a

Answer 21

Velocity

Question 22

A merry-go-round horse moves at a constant speed but a changing______

Answer 22

Velocity

Question 23

Acceleration is a rate of change of

Answer 23

Velocity

Question 24

A horizontal line on a velocity/time graph shows_____

Answer 24

Same speed

Question 25

Inertia varies depending on

Answer 25

Mass

Question 26

Newton's first law of motion is also called the law of_____

Answer 26

Inertia

Question 27

What is the speed of a bobsled whose distance-time graph indicates that it traveled 100m in 25s

Answer 27

2 m/s^2

Question 28

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1s what the Accerlation

Answer 28

2m/s^2

Question 29

Te upward force on an object falling through the air is ______

Answer 29

Air resistance

Question 30

The relationship among mass, force, and acceleration is explained by ______

Answer 30

Newtons 2 law of motion

Question 31

A feather will fall through the air more slowly than a brick because of_______

Answer 31

Air resistance

Question 32

The acceleration due to gravity is

Answer 32

9.8 m\s^2

Question 33

According to newtons 2 law of motion

Answer 33

F=m•a

Question 34

When an object moves in a circular path, it Accerelates toward the center if the circle as a result of

Answer 34

Centripetal force

Question 35

The path if a projectile is ______

Answer 35

Curved

Question 36

For any object, the greater the force that's applied to it, the greater it______ will be

Answer 36

Acceleration

Question 37

The size of the gravitational force between two objects depends in their _________

Answer 37

Masses and the distance between them

Question 38

When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called?

Answer 38

Action-reaction

Question 39

The statement "to every action there is an equal and opposite reaction" is_________

Answer 39

Newton's third law of motion

Question 40

A 300-N force acts on a 25-kg object. The acerelation of the object is

Answer 40

12 m/s^2

Question 41

The SI unit of force is the

Answer 41

Newton

Question 42

When an unbalanced force acts on an objects

Answer 42

The object accelerates

Question 43

What is the momentum of a 50- kilogram ice skater gliding across the ice at a speed of 5 m/s

Answer 43

250 kg• m/s

Question 44

The rate at which work is done is called

Answer 44

Power

Question 45

The unit of power

Answer 45

Watt

Question 46

If you exert a force of 10 N to lift a box a distance of .9 m, how much work do you do?

Answer 46

9J

Question 47

The kinetic energy of an object increases as it_______ increases

Answer 47

Velocity

Question 48

The SI unit for energy

Answer 48

Joule

Question 49

A bus engine transfer chemical potential energy into _______ so that the bus moves

Answer 49

Kinetic energy

Question 50

In a nuclear fusion reaction, mass Is transferred into______

Answer 50

Energy

Question 51

According to the law if conservation of energy, the total amount of energy in the universe _____

Answer 51

Is never created or destroyed but change forms

Question 52

A material that reduces the flow of heat by conduction, convention and radiation is _____

Answer 52

An insulator

Question 53

The transfer if energy that does big require matter is ________

Answer 53

Radiation

Question 54

Energy from the sun travels to earth as________

Answer 54

Radiant energy

Question 55

The process by which engine fuels burn is called

Answer 55

Combustion

Question 56

A device that converts thermal energy into mechanical energy is a____________

Answer 56

Heat engine

Question 57

The energy of motion is called?

Answer 57

Kinetic energy

Question 58

A small 20-kilogram canoe Is floating downriver at a speed of 2 m/s. What is the canoes kinetic energy?

Answer 58

40J

Question 59

An objects graviton all potential energy is not directly related to which if the following

Answer 59

It's speed

Question 60

A 4- kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cats gravitational potential energy relative to the floor if the acceleration due to gravity 9.8 m/s^2

Answer 60

118J

Question 61

Which of the following increase when an object becomes warmer

Answer 61

Thermal energy

Question 62

The energy stored in gasoline is

Answer 62

Chemical energy

Question 63

The mechanical energy of an object equals it______

Answer 63

Kinetic energy plus it's potential energy

Question 64

Fossil fuels currently account for the majority of the worlds energy use because they are______

Answer 64

Relatively inexpensive and readily available

Question 65

Heat is the transfer of thermal energy from one object to another because of a difference In_______

Answer 65

Temperature

Question 66

What property of an object is related go the average kinetic energy if the particles in that object?

Answer 66

Temp

Question 67

The formula Q= m•c•

Answer 67

C

Question 68

The specific heat of copper is .385 J/g•C* which equation would you use to calculate the amount of heat needed to raise the temp of .75g of copper from 7*C to 29*C

Answer 68

Q= .75 g• .385J/gC •22C

Question 69

Matter that has a definite volume and a definite shape is a

Answer 69

Solid

Question 70

Has a definite volume but no for sure shape

Answer 70

Liquid

Question 71

Most matter________ when heated

Answer 71

Expands

Question 72

The theoretical point at which all molecular motion stops is called

Answer 72

Absolute 0

Question 73

The SI unit for pressure

Answer 73

Pascal

Question 74

Which of the following states bernollis principle

Answer 74

As the speed of a fluid increases the pressure within the fluid decreases

Question 75

Which substance will float in corn syrup

Answer 75

Glycerin

Question 76

According to ________ the buoyant force on an object in a fluid is = to the weight of the fluid displaces by the object

Answer 76

Archimedes

Question 77

The velocity of a fluid increases the pressure exerted by the fluid decreases

Answer 77

Bernoullis principle