Ø Plants need oxygen from the air for respiration .
Ø Plants also need carbon dioxide from the air to make food.
Ø Plants make food through photosynthesis.
Ø Plants will die without air.
PLANTS NEED WATER
Ø Plants absorb water from the soil through their roots.
Ø Plants need water for:
· Making food during photosynthesis
· Transporting food and minerals to the plant tissues
· Keeping the plants cells turgid
PLANTS NEED SUNLIGHT
Ø Green plants can make their own food through photosynthesis.
Ø Sunlight is necessary for photosynthesis.Without sunlight plants will die.
Ø Green leaves contain chlorophyll to trap sunlight.
Ø Sunlight provides the energy needed or water to combine with carbon dioxide to produce glucose in the leaves.Oxygen is produced as a by-product.