Science - forces and magnetism

A force is a _______________ acting on an object.

What should go in the blank space?

• push

• pull

• push or a pull

• action

What is friction?

• a force that happens between two surfaces rubbing together

• a force that happens on only one surface

• a force that keeps everything on Earth

• a force that can be shown with a magnet

True or false?

The smoother the surface the less friction there will be.

Which of these show friction being useful?

• an ice skater on ice

• travelling down a water slide

• catching a ball

• stopping a bike using the brakes

The following are the result of an investigation into friction. Three materials were tested to see how far up they had to be lifted before a toy car slid down them.

Carpet - 70cm

Rough wood - 43cm

Rubber bath mat - 82cm

Which material had the most friction?

• carpet

• rough wood

• rubber bath mat

Which of these shows a pulling force?

• jumping on a trampoline

• hitting a ball with a bat

• a car taking a trailer somewhere

• tying shoe laces

If an object is magnetic it is said to be....

• repelled by a magnet

• nothing special

• magic

• attracted to a magnet

What are the two magnetic poles on a bar magnet?

• north

• east

• south

• west

Opposite magnetic charges, when put together, will…

The same magnetic charges, when put together, will…

• attract

• repel

• do nothing

• jump