Ch. 4 Science Test - 3rd Grade

Two children are playing catch. One child misses the ball. What causes the ball to fall to Earth?

• friction

• speed

• gravity

• mass

What always changes when an object is in motion?

• its direction

• its position

• its speed

• its mass

Which simple machine is used to raise the flagpole?

• pulley

• lever

• inclined plane

• wedge

When riding a bike what force would cause the wheels to slow down?

• gravity

• position

• magnetism

• friction

Which of the following is a non-contact force?

• magnetism

• push

• pull

• friction

An objects location is called its

• motion

• position

• speed

• friction

What can you do with a lever?

• lift a box

• hold two boards together

• slice through an object

• turn an axle

Two students are pushing opposite sides of a box, but the box does not move. Why?

• They are using no force.

• One student is applying more force.

• They are using the same amount of force.

• One student is applying less force.

Applying a greater force to a rolling object will make it

• roll faster

• have greater mass

• roll more slowly

• stay in the same position

Tugging on a rope is an example of

• an inclined plane

• a lever

• a push

• a pull