Transcript Science of trees - thetreecomenius

THE SCIENCE
OF TREES
Sunlight gives energy to everything
on earth.
We need sunlight for photosynthesis
Water combines with
carbon dioxide to
produce sugar and
oxygen.
THE LIVING
TREE
Heartwood - is the dead
inner part of the tree which
gives it strength
Sapwood - is the outer layer
which carries water and
sugars up and down the tree.
Bark - is the outside layer of
the tree which protects it.
TREES BREATHE LIFE INTO US
One of the byproducts of trees
is oxygen, which
is vital to us.
An area of plants
625m2 is needed
to produce
enough oxygen
for one person.
WHAT DO TREES NEED?
•Sunlight and water (in order to stay healthy)
You and I can survive on bread and water – is sunlight and
water enough to keep our trees happy?
•Trees like people require nutrients
•They obtain these from the soil – organisms such as worms,
insects, fungi and bacteria
•MULCH is important – this can be manure, rotting leaves,
rotting grass, wood chip etc
Frequently Asked Questions
•How long does it take for trees to grow to their full size?
This depends on the climate, the type of tree, the area – so it
depends. Some trees may take 30 years, others may take a
hundred years.
•Why do leaves of deciduous trees change colour?
Leaves are full of chlorophyll which is green in colour but
there are other ‘hidden’ colours in a leaf. In spring and
summer chlorophyll is working hard and is very prominent.
In autumn the food production slows down. When this
happens, the green colour of the chlorophyll disappears and
the other leaf colours are allowed to show through.