Transcript Micro-Organisms

Micro-Organisms
Micro-Organisms
Micro-organisms are tiny living organisms.
All living organisms feed, grow and reproduce.
Some micro-organisms can be useful whereas
others can be harmful.
All living organisms have a life cycle to
ensure survival.
Different micro-organisms are found in
different places/habitats.
Key Vocabulary
Bacteria
Bacterium
Bug
Germ
Microbe
Mould
Pasteurize
Sterilise
Virus
Yeast
Micro-organisms are too small to
be seen with the naked eye!
500 bacteria would only cover a full stop!
You would need 160 000 000 000 bacteria
to fill a teaspoon!!
A colony of micro-organisms
Some micro-organisms can be
harmful!
Certain bacteria can make stone
decay…as well as teeth!!!
Clean Those Teeth!
Design a dental
hygiene poster
which gives advice
about how to keep
your teeth and
gums healthy
(4-6 bits of
advice!!).
Micro-Organisms –
The Sequel!!!
Preventing Micro-organisms Spreading
Micro-organisms can spread illnesses
and diseases in a variety of ways
including:
Coughs and sneezes
Touching infected people or objects
Insect bites
Infected food
Stop Them Spreading!!
List as many ways as you can
of preventing the spread of
micro-organisms.
Kitchen Hygiene
It is very important to prevent microbes
spreading in the kitchen because this
could lead to food poisoning!
Research Tasks
Compile a factfile on either:
1. Louis Pasteur
2. Anton Van Leewenhoek
3. Alexander Fleming
Write an information text on:
4. Preserving Food
5. Good Microbes!
Making Food Using Micro-organisms
Some foods are made using
micro-organisms.
These include…..
Yeast
Yeast is a micro-organism
which is used in the making of
bread!
When the yeast is mixed with sugar
and water, dough is created and
when it is left to ‘prove’ the yeast
reproduces and makes CO2
which makes the dough ‘rise’.
If we add more sugar I think that….
If we add more yeast I think that…
ERM!!!!!
Preserving Food
In order to prevent food ‘going
off’, it can be preserved/stored in
the following ways.
Freezing
Dehydrating
Canning
Pickling
Freezing
Dehydrating
Canning
Pickling
Helpful Micro-organisms
We cannot survive without some
micro-organisms!
Microbes are
essential to life on
earth.
Without any microbes, we would be
left with mountains of waste material
that wouldn’t decay.
What A Lotta Rot!
Average rotting times for some
household waste products are:
Orange peel and banana skin:
2 years!!
Crisp Packet:
20 years!!
Aluminium Drinks Can:
100 years!!
Glass bottle:
1000 000 years!!!
Plastic Bottle:
Possibly never if not
biodegradable!!!
Will it Rot or Not?!
Another word for a material that will rot is…..
BIODEGRADABLE
Draw a dustbin and inside it
draw those items that are not
easily biodegradable.
Outside the bin, draw those
items that are biodegradable.
Mould
When you see
mouldy food,
you are seeing
colonies
(groups) of
microbes.
Investigating Micro-Organisms
Our Challenge:
 Discover the conditions
microbes require to grow
well.
Explain whether the
evidence shows that
microbes are living things.
Mould Investigation Planner
Question
Equipment
Method
We Will Keep Constant
We Will Change
Mould Investigation Findings
Describe what the results of
Year 6’s investigation show.
What conditions do microorganisms prefer?
How do you know?
Are micro-organisms living
things?
How do you know?