How the leaf changes raw sap into elaborated sap
· The leaf feeds the
It receives the raw sap; it changes the raw sap into elaborated
This change is called plant material synthesis.
What is plant material synthesis?
· Heaps of sand, wood and bricks
are not a house.
To build a house you have to put them together.
them with cement.
The cement changes the wood, sand and bricks into a house.
· Water and mineral salts cannot
feed the plant.
They have to be put together, they have to be joined.
are water and mineral salts joined together?
· The leaves live in the
The air contains carbon dioxide gas.
The carbon dioxide gas is made
of oxygen and carbon.
The leaf keeps the carbon and gives off oxygen.
· The carbon joins the mineral
sale and the water.
The mineral salts and water are changed into elaborated
The elaborated sap can then feed the plant.
The carbon changes the
raw sap into elaborated sap.
This is plant material synthesis.
sand, wood and bricks with cement requires work.
You can't have a house
without men's work, men's energy.
To join water and mineral salts with carbon
also requires work and energy.
· Light gives the leaf this
Light enables the leaf to change raw sap into elaborated
At night there is no light, and the raw sap is not changed.
Light enables the leaf to change
raw sap into elaborated