Chapter 2: Force and Motion

A _____ is a pull or a push.

• force
• friction
• gravity
• speed

One way that a force can cause the change in an object's motion is to...

• do nothing.
• eat ice cream.
• start the object moving.
• shine on the object.

A _____ moves an object closer to you.

• push
• pull
• friction
• cat

How are a push and a pull alike?

• You can hear them both.
• They are both names of cats.
• You can do them both at the same time.
• They are both forces.

What force moves an object away from you?

• pull
• push
• gravity
• Jedi force

Another way that force can cause the change in an object's motion is to...

• change its color.
• change its pitch.
• change its direction.
• change its spots.

_____ is the force that slows and stops motion between touching objects.

• Friction
• Gravity
• Pull
• Push

Which has the least friction?

• snowboard on a snowy hill
• running on the playground
• sandpaper on wood
• a racer on a track

Why is there less friction between two ice cubes touching than between sandpaper on wood?

• They have rough surfaces.
• They have loud surfaces.
• They have smooth surfaces.
• They have bright surfaces.

What is one way to reduce friction?

• Put sandpaper between the surfaces that touch.
• Push the surfaces closer together.
• Shine a light on the surfaces.
• Put a slippery substance between the surfaces.