2. All living things are created by God.
Humans, animals and plants are living things.
They vary in size and can be seen with naked
eyes. However, there are tiny living things that
can only be seen through a microscope. These
are called microorganisms.

3. There are different types of microorganisms.
They are bacteria, protozoa, fungi and virus.
Bacteria Protozoa Virus Fungus

4. Bacteria exist in different shapes, sizes and
colours.

5. Most protozoa are found mainly in
ponds, lakes and rivers. Some of them eat other
microorganisms as food.

6. Fungi can be found on mouldy bread, rotten
food, trees and forest floors.

7. Virus is the tiniest microorganism. It can be
found living in some
fungi, protozoa, animals, plants and humans.

8. Just like other living things,microorganisms
also undergo life process. They breathe, move
and grow.

9. Yeast is an example of microorganism. It is a
fungus. It is used to make bread. There are air
spaces in the bread. The air spaces are caused
by carbon dioxide gas given out whenthe yeast
acts on the dough. This shows that
microorganisms breath.

10. What happens when you leave a bowl of rice
gor a few days? It will be covered with white
patches. The patches that you see on the rice
are actually fungi. The patches become bigger
after sometime. This shows that
microorganisms grow.

11. These microorganisms do not have legs, but
they are able to move.

12.  Tapai is a popular food in Malaysia. It is made
from glutinous rice or tapioca. Yeast is added
to make tapai.
 Yeast is also added to make bread.
 Bacteria and fungi cause dead organisms to
decay to form natural fertelizers.
 Some bacteria can be used to make cheese and
bacteria.
 Fungi are used to produce antibiotics.

13.  Some microorganisms that enter the body can
cause illness.
 Eating food contanimated with microorganisms
can cause food poisoning.
 Bacteria can acton the food remains between the
teeth. This produces acid which causes tooth
decay
 Food turns bad because of bacteria and fungi.

14. Some disease can easily spread from one
person to another. They are called contagious
diseases. Examples are
influenza, measles, mumps and chicken pox.

15.  Through food and drink.
 Sneezing or coughing.
 Direct contact.
 Carried by mosquitoes or flies.
 Microorganisms can also spread through the
air.

16.  Wash your hands before handling food
especially after using the toilet.

17.  Drink water that has been boiled because
boiling kills microorganisms.

18.  Cover your mouth when coughing or sneezing
to prevent microorganisms from spreading into
the air.

19.  Do not share personal items such as
toothbrush, towel and comb.

20.  Cover your wound to prevent it from infection.

21.  Put patients with contagious diseases such as
dengue fever, malaria, chicken pox,
conjunctivitis or mumps into quarantine.