Balancing Forces Ch. 3-5 Review

___________ is the pull between Earth and other objects, which acts even without touching.

• Gravity

• Magnets

• Repel

• Swing

Gravity is what kind of force?

• Touching

• Non-touching

Is gravity an attracting force, repelling force, or both?

• Attracting

• Repelling

• Both

Gravity pulls objects...

• to the left

• to the right

• toward the center of the Earth

What effect does Earth's gravity have on us?

• It lets us float.

• It pulls us to the ground.

• We are too small for it to affect us.

• It moves us around in a circle.

After a baseball is hit into the air, what will happen?

• It will stay in the air forever.

• It will come back down.

• It will go backwards.

All of these are moving in the direction of the pull of gravity EXCEPT...

• a bird flying in the air.

• a ball rolling down a hill.

• a child falling back down to the ground after jumping in the air.

What could move a chair across a floor?

• gravity

• magnetic force

• a touching force (push or pull)

What makes the floating train start to rise off the tracks?

• A repelling force between the magnet in the track and the magnet in the train.

• An attracting force between the magnet in the track and the magnet in the train.

What makes the floating train fall back down to the tracks?

• Repelling magnetic forces between the train and the track.

• Gravity, an attracting force between the train and Earth.