Forces

Tony and Leen are investigating air resistance.

Tony drops a paper clip, a feather, a watch and a shoe from the same height.

which object will take the longest time to reach the ground?

• the paper clip

• the feather

• the watch

• the shoe

A leaf falls from a tree

what causes the leaf to fall to the ground?

• magnetism

• friction

• evaporation

• gravity

What does Steford use to raise the bucket from the well?

• gravity

• pulley

• lever

• gear

Some pupils see who can lift the most weight. They make the chart below to show their results.

Which graph shows the results from the chart?

• A

• B

• C

• D

Which substance will the wooden box move over most easily?

• Soil

• grass

• wool

• glass

Aeroplane can be made from different metals. it is best if an aeroplane is light and strong.

Look at the table below:

Which metal would be best for an aeroplane?

• iron

• aluminium

• copper

• zinc

Diana plans to time how long a ball of clay takes to fall 100 cm. Then she plans to repeat the investigation again in water

what is Diana testing in this investigation?

• the effect of air resistance compared to water resistance

• the effect of air resistance compard to gravity

• the effect of water reistance compared to gravity

Emma is investigating how well different metals conduct heat. She attaches three rods made out of different metals to a container.

Wax melts when it gets hot. Emma fills the container with hot water. What should she do next?

• add some wax to the hot water

• remove the metal rods from the container

• time how long the water takes to cool down

• time how long the wax takes to fall off each rod

The lungs are inside the ribcage.

what is the main way the ribcage helps the lungs?

• the ribcage stores blood for the lungs

• the ribcage protects the lungs

• the ribcage carries nutrients around the body

• the ribcage carries oxygen to the lungs

what type of tooth is shown in the picture?

• canine

• incisor

• wisdom

• molar