In science, when one object runs into another we call it a __________.

• crash

• hit

• strike

• collision

Tags

NGSS.MS-PS2-1

A force that slows down an object when it rubs against another object.

• gravity

• velocity

• inertia

• friction

The natural force that pulls objects toward the earth.

• friction

• inertia

• gravity

• acceleration

Tags

NGSS.MS-PS2-4

What would you need to move a soccer ball?

• friction

• gravity

• force

• inertia

Tags

NGSS.MS-PS2-2

Antoina wanted to see how far she could slide a hockey puck 

across different surfaces. She chose to slide the puck across a sidewalk, 

an asphalt road, and the tiled kitchen floor in her house.

Antonia designed this experiment to observe which of the following forces?

• gravity

• friction

• magnetism

• electricity

Tags

NGSS.MS-PS2-2

Students conducted an investigation in which they rolled marbles 

across different surfaces to measure the effect of the force of 

friction on each surface. Friction slows down and stops objects.

Which of the surfaces tested showed the greatest amount of friction?

• Surface A

• Surface B

• Surface C

• Surface D

Tags

NGSS.MS-PS2-2

A student sets up an experiment using the ramp below to test how

friction would affect how far a car would travel after leaving a ramp.

In order for the student to test the effect of friction on a rolling car, which of the following variables would need to be changed?

• the height of the ramp

• the color of the car

• the mass of the car

• the type of surface on which the car rolls

Tags

NGSS.MS-PS2-2

Which of the following is a question about forces that could be tested in a classroom investigation?

• Which airplane design travels the

  greatest speed?

• How does the height of a ramp affect how far a car rolls?

• Does gravity exist in all parts of the universe?

• Which toy car has the greatest mass?

Tags

NGSS.MS-PS2-2

A student wanted to see how his toy car would roll on different types of flooring. He decided to roll the car on a tile floor, a wood floor, and a carpeted floor.

His experiment was designed to test the effects of which of the following forces?

• Gravity

• Gravity and magnetism

• Magnetism and friction

• Friction

Tags

NGSS.MS-PS2-2

A push or pull on an object, causing it to move, stop, or change direction.

• motion

• gravity

• force

• inertia

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2