Your lungs help you to _______.

• Digest food

• Breathe

What is the function of the brain?

• To help you think and move

• To pump blood

The arrows in a food chain show _______.

• The direction of energy flow

• The size of animals

Most fossils are buried under rocks _______.

• On the surface

• Deep underground

Your heart is made of _______ which is strong and can squeeze blood.

• Muscles

• Blood vessels

Children take _______ breaths than adults because their lungs are smaller.

• More

• Fewer

Seaweed is an example of a _______.

• Producer

• Consumer

Polar bears are examples of _______.

• Mammals

• Insects

Over time, the mud turns into _______.

• Sand

• Rock

Your heart beats faster when you _______.

• Sleep

• Exercise