A _______________ can pull metal objects containing iron without touching them.

• MAGNETS

• GRAVITY

________________ forces cause the rope in tug-of-war to move in a certain direction.

• UNBALANCED

• BALANCED

Forces that work together and make no change in motion are called ______________.

• BALANCED

• UNBALANCED

Smooth surface cause ____________ friction.

• LESS

• MORE

You can find the speed of an object if you ______________ distance by time.

• DIVIDE

• ADD

• SUBTRACT

The roller coaster moves at a _____________________ speed.

• VARIABLE

• CONSTANT

• SLOW

A plane that flies steadily at 900 kilometers per hour is moving at a ___________________________.

• UNBALANCED

• BALANCED

• CONSTANT

Which of the following would not affect the motion of an object?

• change in mass

• balanced forces

• greater force

• more friction

Ivannah and Irvine are playing volleyball. Ivannah misses to hit the ball. What causes the ball to fall to earth?

• friction

• speed

• gravity

• mass

Which will make a bowling ball roll faster?

• Increase the distance it rolls.

• Apply a greater force

• Increase the ball’s weight

• Increase the ball’s mass