18221262
Description
Flashcards by Seth Bailey, updated more than 1 year ago
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Created by Seth Bailey
over 5 years ago
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| Question | Answer |
| What is photosynthesis | a chemical process which takes place in every green plant |
| What does photosynthesis do? | produces food in the form of glucose (a carbohydrate) |
| Where does photosynthesis happen in the plant | all the green bits mainly the leaves |
| What word equation summarises photosynthesis | |
| Name the four things needed for photosynthesis | sunlight chlorophyll carbon dioxide water |
| What is Chlorophyll | a green chemical found in the chloroplasts of plant cells. |
| What does carbon dioxide do in plants? | diffuses into the leaves from the air |
| What is the purpose of water for plants? | It absorbs soil by the plant roots and is carried up to the leaves |
| Chlorophyll absorbs s______ and uses its energy to convert c______ d______ and w_____ into g_____. | sunlight carbon dioxide water glucose |
| Why are leaves on plants broad? | the big surface area absorbs light |
| Where are most of the chloroplasts found in cells of leaves | near the top where they can get most light |
| The underside of the leaves are covered in tiny holes, what are they called? | stomata |
| What do the stomata on the underside of the leaves do? | Allow carbon dioxide to diffuse into the leaf from the air and allow oxygen to diffuse out. |
| Leaves also contain a network of veins, what is their job? | to deliver water to the leaf cells and take away glucose. |
| What are the long narrow cells packed with chloroplasts, mainly at the top of the cells called? | palisade cells |
| What is transpiration? | movement of water through a plant and its leaves |
| What is the name of the pipeline that transports water and minerals from the roots up the plant stem and into the leaves. | xylem |
| The roots of the plant have a special cell which penetrate between the soil particles, they have a long surface area to absorb water, what are they called? | root hair cells |
| Plants grow using the food they make for themselves in photosynthesis but to keep healthy they need something else which they find in the soil, what is it? | minerals |
| What does phosphorus deficiency cause? | poor root growth and discoloured leaves |
| What do fertilisers (or manure) do? | release minerals quickly into the soil |
| How would you test a leaf for starch | boil the leaf to destroy the cell wall and break down cellulose fibres. Put leaf in test tube filled with me |
| Hydrogen Carbonate is an orange solution. In more acidic conditions it turns..(what colour) | yellow |
| Hydrogen Carbonate is an orange solution. In less acidic conditions it turns..(what colour) | red |
| Carbon dioxide dissolves in water to form what? | an acidic solution |
| Which raw material are used in photosynthesis? | water, light and chlorophyll |
| What did Jan Baptist van Helmont discover and then Joseph Prisley | that a rat could not live in a sealed jar! if you put a plant with the rat it would live until the plant couldn't photosynthesis because there was no light |
| name 5 ways plants use glucose | turn it to starch and store store as fats and oils makes cellulose for plant cell walls use for energy protiens for growth and repair |
| What type of reaction is photosynthesis | endothermic reaction |
| Explain photosynthesis in 3 stages | carbon dioxide and water go into the leaf light energy is absorbed by chlorophyl glucose is made with light energy + Co2 + water |
| What is a waste product of photosynthesis? | oxygen |
| Name 3 uses of glucose from photosynthesis | Photosynthesis doesn't happen at night (no light) Glucose fats and oils amino acids - (which are made from absorbing nitrate ions from the soil) |
| why do farmers want to increase the rate of photosynthesis how do they do this? | increases the yield of crops produced by adding light and heat in green houses and carbon dioxide which is expensive. |
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