Plants

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  • Created by: emews
  • Created on: 30-10-17 16:08
Equation for photosynthesis
Carbon dioxide + water ----> glucose + oxygen
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Light energy is absorbed by...
Chlorophyll
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Light energy is used to convert carbon dioxide and water into a sugar called...
Glucose! Oxygen is also released but as a by-product.
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4 Factors that affects photosynthesis
Amount of water, Amount of sunlight energy (light intensity), temperature and the carbon dioxide concentration.
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What reaction are leaves structured to carry out effectively.
Photosynthesis
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What are the three things that a leaf needs? (to carry out photosynthesis effectively)
The ability to absorb light energy efficiently, A way to transport water to the leaf, and glucose to the other parts of the plant, a way to exchange carbon dioxide and oxygen.
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What are the 4 features and functions of a leaf?
Large surface area to maximise light absorption, thin for short diffusion distance, thin waxy cuticle to protect the leaves without blocking the sunlight, thin transparent epidermis to allow light to reach the palisade cells.
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What do plants need for a healthy growth? (from the ground)
Mineral ions
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What is absorbed through the roots? By what process and why by that process?
Mineral ions are absorbed by active transport because they are dissolved in the soil water.
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What two main ions are needed by plants?
Magnesium and nitrate
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Magnesium is needed to make chlorophyll. What happens if the leaves doesn't get enough magnesium ions?
The leaves turns yellow.
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Nitrate is needed to make amino acids. What happens to the leaves if there isn't enough nitrate?
The plant will stop growing
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What are nitrogen fertilisers used for?
They are used to replace minerals used by the plant.
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What do nitrogen fertilisers provide?
They provide plants with water-soluble sources of nitrogen that they can absorb through their roots.
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Nitrogen fertilisers allow farmers to do what?
They allow them to increase the yield and quality of their crops.
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Overuse of nitrogen fertilisers can cause problems. What happens when excess nitrate enters rivers or lakes from fields?
Eutrophication. This can lead to the death of aquatic animals.
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Other cards in this set

Card 2

Front

Light energy is absorbed by...

Back

Chlorophyll

Card 3

Front

Light energy is used to convert carbon dioxide and water into a sugar called...

Back

Preview of the front of card 3

Card 4

Front

4 Factors that affects photosynthesis

Back

Preview of the front of card 4

Card 5

Front

What reaction are leaves structured to carry out effectively.

Back

Preview of the front of card 5
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