Science - photosynthesis

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What is photosynthesis?
The process by which green plants make their own food.
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What do they use as a energy source?
The sun
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What do all food chains start with?
Green plants called producers
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Whenever a plant is in strong light it will photosynthesise and produce what?
Glucose
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What is the best temperature for photosynthesis?
About 30oc
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What's the temperature when photosynthesis slows down?
When it rises above 45oc
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What things does a plant need for photosynthesis?
Carbon dioxide, water, and light ( a source of energy)
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What are the things that plants make by photosynthesis?
Glucose and oxygen
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What is the equation for photosynthesis?
Carbon dioxide + water = glucose + oxygen
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Where does photosynthesis take place?
Inside small plant cells in small objects called chloroplasts
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Why are chloroplasts green?
Because they contain the green pigment chlorophyll
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Why do cells near the top of the leaf always have a large number of chloroplasts?
So that they can absorb sunlight for photosynthesis
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In variegated leaves, in what part does photosynthesis only carry out in?
The green part of the leaves
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Describe what's in a plant cell
There is a cell wall, cell membrane, cytoplasm, nucleas, vacuole and chloroplasts
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What is the name used for the ingredients water and carbon dioxide?
Reactants
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What causes photosynthesis to increase?
If the carbon dioxide concentrations increased then photosynthesis will increase
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Do plants take in food from their roots?
No
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Where does photosynthesis mainly take place?
In leaves, although, any plant cell that has chloroplasts can carry out photosynthesis.
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When there is light and chlorophyll present they can make glucose, what is released as a waste product?
Oxygen
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Which three structures do both plant and animal cells have ?
Nucleas, cytoplasm, cell membrane
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Which three structures do only plant cells have ?
Vacuole, cell wall, chloroplasts
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What does the nucleas do?
It controls chemical reactions in the cell
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What does the cell wall do?
It helps keep the plant rigid
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What does the vacuole do?
It holds water to keep the cytoplasm up against the cell wall
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What does the cell membrane do?
It controls what goes in and out of the cell
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What does the chloroplasts do?
It contains the green pigment chlorophyll
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What does cytoplasm do?
This matter makes up most of the cell, it is where chemical reactions take place
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What gas is released as a result of photosynthesis?
Oxygenn
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How does carbon dioxide enter the plant?
Through gaps in the lower epidermis called the stomata
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How does water enter plant?
Through the roots and then it reaches the leaf through the vein
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Other cards in this set

Card 2

Front

What do they use as a energy source?

Back

The sun

Card 3

Front

What do all food chains start with?

Back

Preview of the front of card 3

Card 4

Front

Whenever a plant is in strong light it will photosynthesise and produce what?

Back

Preview of the front of card 4

Card 5

Front

What is the best temperature for photosynthesis?

Back

Preview of the front of card 5
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