Photosynthesis

Question 1

Is photosynthesis endothermic?

Answer 1

Yes.

Question 2

What is photosynthesis?

Answer 2

• Takes place in the plant.
• ## Leaves contain chlorophyll which can absorb the light needed for photosynthesis.

Question 3

Photosynthesis simplified?

Answer 3

-Plant takes in co2 and water into the leaf.
- Light energy is absorbed into chlorophyll.
- Light is used to convert co2 and water into glucose and oxyen is also produced.
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Question 4

What is the word equation for photosynthesisLi

Answer 4

Carbon Dioxide + Water —> Oxygen + Glucose.

co2 + H20 –> o2 + C6H12O6.

Question 5

• Light Intensity to Rate of Photosynthesis graph;

Answer 5

• As Light intensity increases= Rate of photosynthesis increases.
• ## Plant has more light energy to carry out photosynthesis so reaction is faster.

Question 6

When the rate of photosynthesis increases as light intensity increases whatdoes this show?

Answer 6

• Tells us that light is a limiting factor.
• ## Photosynthesis was not fast as it could be because there was not enough light.

Question 7

What happens when the light intestintiy incerases but the rate of photosynthesis does not increase?

Answer 7

• Light Intesinity is no longer a limiting factor.
• Something else may be short in supply.
• E.g: Level of co2.

Question 8

Are the graphs the same?

Answer 8

Yes. Just different limiting factors.

Question 9

How does chlorophyll affect the rate of photosynthessis?

Answer 9

Leaves with less chlorophyll: Trap less light so, have a lower rate of photosynthesis

Question 10

Temperature to Rate of Photosynthesis graphs:

Answer 10

• Increasing the temperature:
• Enzymes involved in photosynthesis work faster so rate increases.
  If we keep increasing the temperature:
• Enzymes may become denatured
• Rate of Photosynthesis falls.