Science Final Exam

Question 1

three ways to accelerate an object

Answer 1

• speed up
• slow down
• change direction

Question 2

difference between speed and velocity

Answer 2

velocity has direction; speed does not

Question 3

acceleration is a change in…

Answer 3

velocity

Question 4

speed of an object at rest

Answer 4

0

Question 5

what goes on x-axis

Answer 5

time

Question 6

what goes on y-axis

Answer 6

speed or distance

Question 7

what are the units on a car speedometer

Answer 7

miles per hour

Question 8

what causes an object to accelerate

Answer 8

an unbalanced force

Question 9

Newton’s first law of motion

Answer 9

An object in motion stays in motion, and an object at rest stays at rest, UNLESS it is acted upon by an unbalanced force

Question 10

Newton’s second law of motion

Answer 10

force = mass x acceleration F=ma

Question 11

Newton’s third law of motion

Answer 11

For every force, there is an equal and opposite reaction force

Question 12

What causes a ball thrown through the air to fall to the ground?

Answer 12

gravity force

Question 13

The tendency of an object to keep its velocity constant; for example, a brick sitting at rest will tend not to move, unless an unbalanced force acts on it

Answer 13

inertia

Question 14

Newton’s first law of motion is also called the Law of ___

Answer 14

inertia

Question 15

If I hit a brick wall with my fist, then I am providing an __ force, and the wall provides a __ force

Answer 15

action; reaction

Question 16

What is the SI unit of temperature?

Answer 16

Kelvin (K)

Question 17

What is the name for a force that can act on an object even though it isn’t touching it?

Answer 17

noncontact force

Question 18

What is the unit for force?

Answer 18

Newtons (N)

Question 19

In a controlled experiment, there should be a __ group that does NOT get the experimental treatment

Answer 19

control

Question 20

three examples of noncontact forces

Answer 20

gravity, magnetic force, electrical force

Question 21

any push or pull on an object

Answer 21

force

Question 22

When an arrow is used to show a force, its length shows the ___ of the force

Answer 22

strength/size/magnitude

Question 23

an attractive force between to objects that have mass

Answer 23

gravity

Question 24

the amount of matter in an object

Answer 24

mass

Question 25

the SI unit for mass

Answer 25

kilogram (kg)

Question 26

the amount of gravitational force exerted on an object by Earth

Answer 26

weight

Question 27

unit for weight

Answer 27

Newtons (cuz weight is a force!)

Question 28

a force that resists motion between two toughing objects

Answer 28

friction

Question 29

three kinds of friction forces

Answer 29

static, sliding, fluid

Question 30

type of friction that prevents objects from sliding past each other

Answer 30

static friction

Question 31

type of friction between two sliding objects

Answer 31

sliding friction

Question 32

type of friction between a surface and water or air

Answer 32

fluid friction

Question 33

What is the name of a force that acts on an object by touching it?

Answer 33

contact force

Question 34

Sliding is an example of ___ force

Answer 34

friction

Question 35

a speed that does not vary is called ___

Answer 35

constant

Question 36

velocity changes when __ or __ changes

Answer 36

speed or direction

Question 37

to find the average speed of an object, divide ___ over ___

Answer 37

distance over time

Question 38

On a speed-time graph, a straight diagonal indicates that ___

Answer 38

acceleration is constant

Question 39

On a speed-time graph, if the direction of the line changes, it indicates that the object ___ and changed ___

Answer 39

stopped and changed direction

Question 40

on a graph, average speed is the __

Answer 40

slope

Question 41

On a speed-time graph, a change in direction of the line indicates that ___

Answer 41

acceleration is changing to deceleration (or vice versa)

Question 42

to know velocity, you need to know __ and __

Answer 42

speed and direction

Question 43

if you slow down, you are __

Answer 43

accelerating

Question 44

For every action, there is an __ and __ reaction

Answer 44

equal and opposite

Question 45

Who came up with the idea that for every action there is an equal and opposite reaction?

Answer 45

Isaac Newton

Question 46

To get an object at rest moving, you have to overcome __ __ force

Answer 46

static friction

Question 47

the upward force that acts on a falling object

Answer 47

air resistance

Question 48

the tendency of an object to resist a change in motion

Answer 48

inertia

Question 49

another word for mass

Answer 49

inertia

Question 50

the speed an object falls when gravity and air resistance are balanced

Answer 50

terminal velocity

Question 51

a statement accepted as fact

Answer 51

scientific law

Question 52

an idea with lots of supporting evidence that explains a lot of observations

Answer 52

scientific theory

Question 53

the group in an experiment that does not get the experimental treatment

Answer 53

control group

Question 54

the group in an experiment that does get the experimental treatment

Answer 54

experimental group

Question 55

two groups in a controlled experiment

Answer 55

control group and experimental group

Question 56

a variable in an experiment that is the same for all groups

Answer 56

constant

Question 57

a variable in an experiment that is changed by the researcher

Answer 57

independent variable

Question 58

a variable in an experiment that changes because of the independent variable

Answer 58

dependent variable