test for whether sunlight is neccessary for photosynthesis

Question 1

1.

Answer 1

destarch a potted plant by placing it in the dark for 2 days

Question 2

2.

Answer 2

remove one leaf and test it for starch using the iodine solution

Question 3

3.

Answer 3

sandwich a leaf that is still attached to the plant between 2 pieces of black paper with a heart shape cut out from it and fasten the papers with a paper clip
place the plant in strong sunlight

Question 4

4.

Answer 4

after a 1-2 hours, remove the lead and test it for starch

Question 5

results?

Answer 5

the parts that was exposed to the sunlight (in the shape of the shape cut out) should be blue black - starch is present
the parts not exposed (covered by the paper) should remain brown - starch is not present

= sunlight is needed for photosynthesis