The amazing facts

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.

Only one tenth of the cells in your body are really you. The rest are _______________.

• bacterias

• virus

• mites

An experiment found that animals that did not have bacteria will be _______________ or had to have a special diet.

• died

• alive

• fat