B8- Photosynthesis
- Created by: liv.moz
- Created on: 24-04-22 16:41
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- B8-Photosynthesis
- What is it?
- Takes place in plant cells in chloroplasts.
- Chloroplasts contain a green substance called chlorophyll.
- This absorbs the light energy needed to make photosynthesis happen.
- Chloroplasts contain a green substance called chlorophyll.
- 6C02 + 6H2O -> C6H12O6 + 6O2
- Carbon dioxide + water -> glucose + oxygen
- 1) water comes from the sky, taken up from the soil by the roots. Gains light from the sun and the light is taken in by chlorophyll.
- 2) The products of photosynthesis change into glucose and oxygen. Glucose is turned into food, oxygen is released.
- 3 Uses of glucose: Respiration, strach and cellulose.
- Glucose helps to nourish the plant.
- Starch serves as a reserve food supply.
- Cellulose consists of loads of carbon, hydrogen and oxygen atoms.
- 3 Uses of glucose: Respiration, strach and cellulose.
- 2) The products of photosynthesis change into glucose and oxygen. Glucose is turned into food, oxygen is released.
- It is the process of a plant producing glucose and emitting oxygen by taking in carbon dioxide and water.
- Occurs in the leaves where light is taken in by chlorophyll.
- Photosynthesis is an endothermic reaction as it requires light energy to react carbon dioxide and water to produce glucose and oxygen.
- Takes place in plant cells in chloroplasts.
- Leaves
- Adaptations
- Cells have lots of chloroplasts to produce as much photosynthesis.
- Large surface area
- Xylem and Phloem- water transported through xylem tube.
- Air pockets help diffusion to occur; for carbon dioxide.
- Many veins- plenty of water to be carried.
- Stomata on lower surface so carbon dioxide can enter the leaf
- Limiting factors
- As light intensity increases the rate of photosynthesis increases.
- As the carbon dioxide concentration increases the rate of photosynthesis increases.
- As the temperature increases the rate of photosynthesis increases.
- The limiting factors of photosynthesis are the light intensity, amount of CO2 and temperature, but it can also be the amount of chlorophyll in the plant's leaves.
- Adaptations
- Greenhouses
- Helps to increase rate of photosynthesis as it helps to keep cold temperature out of it and winds.
- Also stops them from getting drowned.
- The glass on the GH relfects the sunlight onto the plant leaves. Makes the plants produce more of their own CO2, helping to increase the rate.
- Also stops them from getting drowned.
- Helps to increase rate of photosynthesis as it helps to keep cold temperature out of it and winds.
- What is it?
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