R.Gokulakrishna

1
R.Gokulakrishna
Puan Norzana bt Zulkifly
6 Amir
Investigating Living Things
Microorganisms (Year 5)
2
Microorganisms are tiny living things that cannot
be seen with naked eyes.They only can be seen
using microscope or a magnifying glass.They can
be found in air,water,soil,food and in the human
body.Microorganisms exist in various shapes and
sizes.They need water,air,nutrients,suitable
acidity and suitable temperature from to grow.
3
Bacteria Bacteria is one of the
microorganisms.Bacteria exist in various shapes
and sizes.Bacteria live in dark,warm,damp and
dirty places.Bacteria reproduces if they get
enough food and nutrients .Bacteria is also the
third largest microorganism.
4
Protozoa Protozoa is found in lakes, ponds and
rivers.Protozoa which are larger than virus and
bacteria live in water or damp places.They
reproduce by multiplying using their cells.
5
Fungi The fungi is the largest microorganism.Some
fungi such as mould and yeast live un
soil,garbage,food and on other living things.Some
of them can be seen using magnifying glass.Fungi
reproduce by producing spores.
6
Virus Viruses are the tiniest microorganisms.They
can only be seen under a special microscope
called an electron microscope.Virus can harm
humans,plants and animals.They feed on living
organisms.They are also called as the most
dangerous microorganisms.
7
Microorganisms Are Living Things

• Microorganisms are living things because thay
  carry out the following processes
• -Need to eat to stay alive
• -Reproduce
• -Excrete waste
• -Breathe

8
Useful and Harmful MicroorgaismsUSEFUL
MICROORGANISMS

• Microorganisms such as yeast are useful for
  making bread ,tapai and tempeh
• Bacteria are very useful for making
  fertilisers.They break down dead plants and
  animals and other organic matters to form
  fertilisers
• Fungi and bacteria also can be used to produced
  antibiotics
• Bacteria are also used to produce alcoholic
  drinks
• HARMFUL MICROORGANISMS
• Harmful microorganisms are microorganisms that
  have negative effects on our health
• The effects of microorganisms
• -Cause illness
• -Cause food poisoning
• -Cause food to turn bad
• -Cause tooth decay

9
Microorganisms Diseases caused
Bacteria Food poisoning
Stomachache
Tooth decay
Conjunctivitis
Fungi Thrush
Tinea
Protozoa Malaria
Amoebic Dysentry
Virus Flu
Cough
Measles
Mumps
Chicken pox
Poliomyletis
10
Preventing diseases from spreading

• 1.Some diseases caused by microorganisms can
  spread from one person to another person. This is
  called contagious diseases
• -The ways to prevent contagious diseases
• -Drinking boiled water
• -Covering and treating wounds
• -Covering food
• -Staying away from sick patients
• -Do not sharing personal items such as comb and
  towel
• -Quarantine people who have contagious diseases
• -Covering mouth or nose when sneezing or coughing
• -Washing hands with soaps

11
THE END
THANK YOU