Photosynthesis 2 Flashcards
What is photosynthesis?
It is a process carried out by plants and algae. It makes sugar out of carbon. In this way plants and algae feed themselves as they make their own food. Photosynthesis also produces oxygen which enables other life forms to survive.
What are the raw materials for photosynthesis?
Carbon dioxide and water which combine in the presence of a chemical called chlorophyll and sunlight.
What is the formula of photosynthesis?
Carbon dioxide + water -> glucose + oxygen
What is meant by endothermic reaction?
It needs an input of energy from the environment. The energy transferred from the environment when the bonds holding carbon dioxide and water are broken is more than that transferred back to the environment with the formation of the new bonds in glucose and oxygen.
What happens to the glucose produced during photosynthesis?
Some of the glucose is used immediately by the plant cells for respiration. Most of the glucose is converted into insoluble starch and stored.
On what part of the plant does photosynthesis take place?
The leaves of a plant are able to absorb the maximum amount of photosynthesis.
What makes the leaves perfectly adaptable for photosynthesis?
They are broad allowing plenty of light to fall on them.
They contain chlorophyll to absorb light.
They have veins which bring plenty of water to the cells of the leaves.
They have air spaces to allow carbon dioxide to get and oxygen to leave by diffusion.
What are chloroplasts?
They are small green parts found in the cells in algae and plant leaves.
Why is photosynthesis endothermic?
Because energy is transferred from the environment to the chloroplast by light.
How can you tell that a plant is photosynthesising?
You can tell by the oxygen gas it gives off as a by product.
