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30 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Light energy is converted into chemical energy in what form? |
ATP |
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What is chlorophyll and where is it found? |
A green pigment found in the chloroplast |
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What two materials are needed for photosynthesis? |
Water and Carbon dioxide |
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What two products are created during photosynthesis? |
Glucose Oxygen |
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Why is photosynthesis described as enzyme controlled? |
Enzymes are needed for the reaction to take place |
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How is water obtained and where? |
By diffusion but in the roots |
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How does oxygen leave the leaf? |
It diffuses out |
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Name three thing that can be done with glucose |
Used in respiration Stored as starch Made into cellulose |
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What is the first stage of photosynthesis called? |
The light dependent stage |
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What does photolysis mean? |
The splitting of water using light |
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Where does photolysis take place and why? |
In the chloroplasts where the water molecules are split to make two subtances |
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What two subtances are made from the water molecules in stage 1 of photosynthesis? |
Oxygen and hydrogen |
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What happens to the oxygen? |
Its released into the atmosphere as a waste product |
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What happens to the hydrogen in stage 1? |
It gets attached to a hydrogen carrier to travel to stage 2 |
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What is stage 2 of photosynthesis called? |
Carbon fixation |
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What does carbon fixation do? |
Takes carbon from carbon dioxide in the air and traps it in carbohydrates |
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What is starch? |
A spiral chain of glucose molecules joined by hydrogen bonds |
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Where does carbon fixation take place |
In the chloroplast |
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What happens in the chloroplast? |
Carbon dioxide is combined with hydrogen from stage 1 using ATP to make glucose |
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What can starch be used as? |
A storage molecule storing energy until the plant needs it |
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What is cellulose? |
Ribbon-like strands of glucose held together by hydrogen bonds |
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How can photosynthesis be measured? |
Measure how quickly the raw materials are used up How quickly the products are made |
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Name one method of measuring photosynthesis |
The Elodea Bubbler experiment |
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Summarise the Elodea Bubbler experiment |
The number of bubbles produced measures the rate of photosynthesis Distance between the lamp and the weed changes the light intensity The tank of water prevents lamp heating up weed If weed is heated up, experiment becomes invalid |
Four bullet points |
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Name the three limiting factors |
Light intensity Carbon dioxide concentration Temperature |
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Explain how light intensity is a limiting factor |
Without enough light, a plant can't photosynthesis very quickly Increasing light intensity will speed up photosynthesis |
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Explain how carbon dioxide is a limiting factor |
A plant can't photosynthesis without sufficient carbon dioxide concentration |
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Explain how temperature is a limiting factor |
Itf it gets too cold, the rate of photosynthesis will decrease Plants can't photosynthesis if it gets too hot as well |
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Where can you control limiting factors? |
In a greenhouse |
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What is the control method for each limiting factor? |
Temperature - heating systems and ventilation Carbon dioxide concentration - paraffin heaters Light intensity - electrical lighting |
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