Rates Of Photosynthesis

Question 1

What is photosynthesis

Answer 1

Photosynthesis is an endothermic reaction as it requires light energy to react carbon dioxide and water to produce glucose and oxygen. The light energy required is absorbed by a green pigment called chlorophyll.

Question 2

How to change the rate of photosynthesis

Answer 2

Change light intensity

Question 3

Step 1

Answer 3

Put some sodium hydrogen carbonate solution in a boiling tube to help the plant photosynthesise, and add a piece of your plant in

Question 4

Step 2

Answer 4

Make sure the plant is fully under

Question 5

Step 3

Answer 5

Cut the stem off the plant

Question 6

Step 4

Answer 6

Count the amount of air bubbles you see coming out of the stem in a 1 minute period, this is the photosynthesis rate

Question 7

Independent variables

Answer 7

Type of plant, light power, light distance, light intensity

Question 8

Do you let the plant adjust to the light first

Answer 8

Yes, for 2/3 minutes