Forces and Changes in Motion- Vocabulary

What is the tendency of an object to resist a change in motion?

• power
• acceleration
• inertia
• work

Equal forces acting on an object in opposite directions

• balanced forces

• centripetal force

• unbalanced forces

• friction

The force that two surfaces exert on each other when the two rub against each other

• friction

• force

• inertia

• momentum

The force that pulls objects toward each other

• gravity

• free fall

• weight

• Universal Law of Gravitation

A measure of how much matter is in an object

• mass

• net force

• terminal velocity

• matter

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.

Tags

NGSS.MS-PS2-2

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

• Friction
• Gravity
• Pull
• Push

Tags

NGSS.3-PS2-1

Which has the least friction?

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

Tags

NGSS.3-PS2-1

What keeps the Moon in orbit around Earth?

• Earth's rotation.
• Earth's atmosphere.
• Earth's gravity.
• Earth's shape.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

Tags

NGSS.3-PS2-1