Amazing Facts (Human body edition)

Only about one tenth of the cells in your body are ...

• alive

• really you

• bacteria

Bacteria are mostly ...

• really helpful.

• bad for humans.

• neither good or bad.

Animals need bacteria to ...

• fight diseases.

• provide energy.

• digest food.

You have ... cells in your body.

• 7 million

• 7 trillion

• 7 octillion

Most of the atoms are ...

• tiny cubes.

• not used.

• empty space.

You probably have mites in your ...

• hair.

• ears.

• eyelashes.

Mites are very small creatures that are about ...

• 3 millimetres long.

• a third of a millimetre long.

• 0.03 millimetres long.

Mites eat ...

• dead skin.

• your eyelashes.

• tiny insects.

Your mouth produces about ... of saliva each day!

• 1 liter
• 2 liters
• 1.5 liters
• 0.5 liters

Bodies give off a tiny amount of .... that’s too weak for the eye to see.

• light
• heat
• sound
• radiation