Forces and Magnets Quiz

Which surface has the least friction?

• sand
• rubber
• ice

Which surface has the most friction?

• Sandpaper
• Ice
• Glass

Which sentences are true about William's investigation? Put a tick on the box.

• Sand produces more friction than carpet.

• Carpet produces around 20N of force.

• Wood has a smoother surface than the carpet.

When one object moves on another object (rubbing each other) it makes a force called __________.

• force
• slip
• friction

A rough _________ produces more friction than a smooth surface.

• surface
• coating
• roughness

A surface that only has a little friction is called a _________ surface. You can easily slide over this surface.

• rough
• slippery
• grippy

A surface that has lots of friction can be called a ________ surface.

• grippy

• slippery

• friction

When we bike, we can apply ________ on the chains to reduces friction.

• sand
• water
• oil

To stop a bike, we should press on the ________ gently until we come to a complete stop.

• accelerator
• horn
• brakes

What Are the Uses of Magnets?

• Magnets are used in growing plants faster and healthier.
• Magnets are used in electric motors, generators, speakers, magnetic locks, compasses

• Magnets are used in cooking food faster and more evenly.