The Sun - Chlorophyll cannot produce it's own energy.
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What is chlorophyll used for?
Reacting carbon dioxide and water.
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What is the product of carbon dioxide and water?
A sugar called glucose.
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What is sugar glucose?
A carbohydrate.
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What is glucose used for?
The glucose is used for respiration or converted into starch and stored. It can be turned back into glucose if it is later needed for respiration.
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What is a by-product of photosynthesis
Oxygen.
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Where is carbon dioxide taken in?
The leaves.
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Where is water taken in?
The roots.
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What is chlorophyll?
A green substance found in the chloroplasts of some plant cells and algae.
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What are the three factors that can limit the rate of photosynthesis?
Light intensity, carbon dioxide concentration and temperature.
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What happens if a plant doesn't have enough light?
The plant cannot photosynthesise very quickly.
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What happens if a plant is limited by an insufficient concentration of carbon dioxide in the air?
It cannot photosynthesise.
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What happens if a plant gets too cold?
The rate of photosynthesis will decrease.
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What happens if a plant gets too hot?
It cannot photosynthesise.
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In a greenhouse, how does adding artificial light impact photosynthesis?
It allows photosynthesis to continue beyond day-light hours. Bright light also provide a higher-than-normal light intensity.
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In a greenhouse, how does adding artificial heat impact photosynthesis?
It allows photosynthesis to continue at an increased rate.
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In a greenhouse, how does adding additional carbon dioxide into the atmosphere inside the greenhouse impact photosynthesis?
It allows photosynthesis to continue at an increased rate.
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Why are paraffin light traditionally used in green houses?
Their use increases photosynthesis because as well as the light generated from the lamps, the burning paraffin also produces heat and carbon dioxide.
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Why do plants and algae store glucose?
Because during the night when it is too dark for photosynthesis to happen glucose cannot be produced therefore they need to store it for then.
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How do plants and algae store glucose?
As insoluble products such as: starch, fats and oils.
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What is glucose used for?
Some glucose is used for respiration to release energy and some is used to produce cellulose which strengthens the cell wall and proteins such as enzymes and chlorophyll.
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What do plants need to make proteins?
Plants need nitrates in order to make proteins which are absorbed from the soil as nitrate ions.
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