8th Grade Science FINAL

Question 1

Which of the following would increase the friction between a table and a floor?

Accepted Answer

putting heavy objects on the table

Question 2

T or F: All objects have inertia.

Accepted Answer

true

Question 3

T or F: If an object is at rest, then there are no forces acting upon the object.

Accepted Answer

false

Question 4

True or False: The mass of an object depends upon its location in the universe.

Accepted Answer

false

Question 5

The force that causes an object to move in a circular path is:

Accepted Answer

centripetal force

Question 6

Which of Newton's Laws best describes why motorists should buckle up?

Accepted Answer

1st

Question 7

Mass and weight are

Accepted Answer

two different quantities.

Question 8

What happens when 2 forces act in the same direction?

Accepted Answer

They add together.

Question 9

A moving bike traveling on a paved path begins to slow down because of what force?

Accepted Answer

frictional

Question 10

T or F: The gravitational force acting on an object is the same as the weight of an obect.

Accepted Answer

true

Question 11

The rate of change in the velocity of an object is known as:

Accepted Answer

acceleration

Question 12

Vector quantities include all of the following EXCEPT:

Accepted Answer

speed

Question 13

As an astronaut travels further away from the Earth, the astronaut's mass

Accepted Answer

stays the same

Question 14

In the absence of an outside force, a moving object will:

Accepted Answer

move with a constant speed.

Question 15

The strength of the gravitational force between objects depends on:

Accepted Answer

mass and distance

Question 16

T or F: A more massive object has more inertia than a less massive object.

Accepted Answer

true

Question 17

When you blow up a balloon, then release it, the balloon will fly away. This is an example of

Accepted Answer

Newton's 3rd Law

Question 18

The measure of the upward force applied by a fluid on an object is called:

Accepted Answer

buoyancy

Question 19

You are standing in a moving bus, facing forward, and you suddenly fall forward. You can imply

Accepted Answer

that the bus's velocity decreased.

Question 20

A helium balloon floats in the air. What can you infer about helium?

Accepted Answer

Helium is less dense than air.

Question 21

Forces can only be added together if they are:

Accepted Answer

acting on the same object.

Question 22

The amount of matter is an object is

Accepted Answer

mass

Question 23

A factor that DOESN'T affect the amount of centripetal force on an object moving in a circle is

Accepted Answer

direction of motion (clockwise or counterclockwise)

Question 24

A wagon is pulled with a force of 3N north and a force of 4N south. What is the resultant?

Accepted Answer

1

Question 25

Action/reaction force pairs act on:

Accepted Answer

the same objects

Question 26

One way to decrease acceleration is to:

Accepted Answer

increase mass

Question 27

Which object has the greatest momentum?

Accepted Answer

a 100 kg hockey player skating 10 mph

Question 28

In physics, a push or a pull is called a(n):

Accepted Answer

force

Question 29

A sled sliding on a flat, icy surface with a constant velocity is a best fit which Newton Law?

Accepted Answer

1st

Question 30

T or F: Inertia is a force that keeps objects at rest and moving objects in motion.

Accepted Answer

false

Question 31

Friction resists motion between:

Accepted Answer

any surfaces in contact

Question 32

In a vector diagram, the length of the arrow represents:

Accepted Answer

the magnitude of the force.

Question 33

If the same force acts upon 2 objects with different masses, the object with the greater mass

Accepted Answer

will accelerate greater than the small mass object

Question 34

T or F: All objects have momentum.

Accepted Answer

false

8th Grade Science FINAL

Questions 34

8th Grade Science FINAL

Questions 34