Why do
we
learn?
SISA SCIENCE
I
GRADE 06
I
SCIENCE FROM QUANTUM TO COSMOS
To be good
citizens
To achieve
what ever
we want in
life
Why are
we here?
For P3
and
Grand 6
What
do we
learn
in
science?
Everything
around us
ENVIRONMENT
Things around us
Things can be divided in to two
groups
❖ Living
❖ Non living
LIVING THINGS
Plants
Animals
Micro organisms
Why are plants special?
Because they
make their own
food
Animals eat the
food produced by
plants
Photosynthesis is
The process of making food by
using the energy from the sun
Photosynthesis = photo + Synthesis
Photo = light
Synthesis = building up
What do plants need to make their
own food?
1.
2.
3.
4.
Carbon dioxide from the air
Water from the soil
Energy from sunlight
Chlorophyll, the green
chemical
Can plants use only light from sun ?
No
They also can use artificial light
What is chlorophyll
Chlorophyll is the green chemical in
leaves that trap light
Why only green plants make
their food?
Word equation for photosynthesis
Carbon dioxide + water
Sunlight
Chlorophyll
Glucose + Oxygen
Chemical equation for photosynthesis
6CO2 + 6H2O → C6H12O6 + 6O2
Main product = Glucose
By product = oxygen
Why oxygen is important?
Plants take in carbon
dioxide and release
oxygen
Plants and
animals use it for
breathing
Importance of photosynthesis
1. Provide food for organisms
2. Produce oxygen for breathing
3. Balance carbon dioxide and oxygen in the air
How do plants absorb carbon dioxide
And remove oxygen?
Through stomata
Stomato are tiny
holes in the under
side of the leaf
How do plants
store the food?
As starch
Where is the
food stored?
In roots, leaves,
stem
How to test starch?