How do plants make their food
By PHOTOSYNTHESIS
- making
food by using light. PHOTO =
LIGHT, SYNTHESIS = MAKE. Plants produce their own food by PHOTOSYNTHESIS.
The food they produce is GLUCOSE. To make
this, plants use LIGHT ENERGY from the Sun, WATER from roots and CARBON
DIOXIDE from the air. Photosynthesis
take place in the LEAVES of all green
plants. Leaves are like little food
factories. They are specially adapted to carry out photosynthesis as efficiently and as quickly as
possible. The main adaptations are: Leaves provide a large surface area to trap
lots of sunlight, as they are flat and thin.
The positioning of the PALISADE cells nearer to the top of leaf. Many CHLOROPLASTS in the Palisade cell. The location of GUARD cells on the surface of the leaf, which control the exchange of gases through the STOMATA. The process of
Photosynthesis can be represented in the form of a chemical
equation: CARBON DIOXIDE + WATER GLUCOSE + OXYGEN Remember: 6CO2 + 6H2O C6H12O6 + 6O2 Four
conditions are necessary for photosynthesis to happen: Light - provided by the Sun onto
the leaves. Water - comes from the soil,
absorbed by root hairs, up the stem and into the leaves. Chlorophyll - 'green
stuff' found in the chloroplasts which
makes
the leaves look green and absorbs sunlight. Carbon Dioxide -
enter the leaves from the
surrounding air.
SUNLIGHT
CHLOROPHYLL
SUNLIGHT
CHLOROPHYLL
Conditions
affecting the rate of Photosynthesis
Tags:Chlorophyll, Light, Water, Carbon dioxide, Photosynthesis