photosynthesis
- Created by: shakirah miah
- Created on: 28-12-20 14:36
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- photosynthesis
- photosynthesis
- Photosynthesis is the process by which plants make carbohydrates from raw materials, using energy from light.
- light energy is absorbed by chlorophyll - a green substance found in chloroplast in green plant cells and algae
- absorbed light energy is used to convert carbon dioxide into a sugar called glucose
- Photosynthesis is an endothermic reaction.
- The light energy required is absorbed by a green pigment called chlorophyll in the leaves.
- Photosynthesis is the process by which plants make carbohydrates from raw materials, using energy from light.
- how plants use glucose
- Glucose is used by plant for energy and to make other substances like cellulose and starch.
- glucose can be combined with nitrates from oil and turned into proteins
- to make fats and oil (energy stored in seeds)
- raw material for growth, repair and replacement
- factors effecting the rate
- Three factors can limit the rate of photosynthesis:
- light intensity, carbon dioxide concentration and temperature.
- Without enough light, a plant cannot photosynthesise very quickly
- Increasing the light intensity will boost the rate of photosynthesis.
- a plant cannot photosynthesise if there is insufficient carbon dioxide.
- If it gets too cold, the rate of photosynthesis will decrease.
- Plants cannot photosynthesise if it gets too hot.
- Three factors can limit the rate of photosynthesis:
- Chlorophyll is located in chloroplasts in plant cells, particularly the palisade and spongy mesophyll cells.
- photosynthesis
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