Amazing facts (May 24th)

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 nor 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.