8.S.V.3

Energy in plants: photosynthesis Plants do not need to eat other living things for energy. Main nutrients of plants: the chemical elements nitrogen, phosphorus, potassium, calcium, carbon, oxygen, hydrogen (some from soil or the sea, others from the air) Photosynthesis, using chlorophyll, converts these elements into more plant cells and stored food using energy from sunlight. Leafy plants mainly get their oxygen dissolved in water from their roots, and their carbon mainly from the gas CO2. Plant photosynthesis uses up CO2 and releases oxygen.