chapter 10 science

Susan is pushing Carlos on a swing. First she pushes lightly. Then she pushes harder. What will happen to the swing?

• It will stop.

• It will not change.

• It will move faster.

• It will move slower.

What is friction?

• a force that causes heat

• a force that can stop a moving object

• a force that can slow down a moving object

• all of the above

What is the force that pulls the coconuts toward the center of Earth?

• gravity

• friction

• a magnet

• electricity

Angela has to work harder to pull a wagon filled with toys than an empty wagon. Why?

• It takes less force to move heavier objects

• It takes more force to move lighter objects

• It takes more force to move heavier objects

• It takes more friction to move heavier objects

When does work happen?

• When you sweat

• when a force moves an object

• when you cannot move an object

• when you push hard against a wall

What objects will magnets attract

• some objects made of glass

• some objects made of metal

• some objects made of wood

• some objects made of plastic

A beaver has long front teeth that it uses to cut wood. What simple machine are a beaver's teeth like?

• screw

• pulley

• wedge

• wheel and axle

The act of moving

• motion

• force

• gravity

• repel

A push or pull that makes something move is called

• motion

• force

• gravity

• attract

a force, pulls things towards the center of Earth

• push

• pull

• gravity

• force