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NAME :  CLASS : . DATE : 
Chapter 4 Interdependence among Living Organisms and The Environment
4.4 Photosynthesis
Definition : Photosynthesis is the process in which green plant absorb solar energy (sunlight) to make food from
carbon dioxide and water.
Oxygen is released as a by-product.
Chlorophyll is the green pigment in leaf that can absorb sunlight.
The glucose produced during photosynthesis is then converted to starch.
Mind map for photosynthesis :
KBAT
Requirements of photosynthesis :
PLANTS NEEDS
Lets us carry out experiment how to test for the presence of starch in leaves if photosynthesis take place.
ANSWER ALL QUESTIONS.
TEST FOR THE PRESENCE OF STARCH
1. Which end product is being tested ?
..
2. What is the purpose of boiling the leaf ?

3. Why is the leaf immersed in alcohol?
.
4. State one precaution that must be taken during this experiment ?

5. KBAT
A leaf to be tested for starch has to be boiled in alcohol. Why is this done?
A. to soften the leaf
B. to remove the chlorophyll
C. to kill the cells of the leaf
D. to dissolve the cell walls

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Chap 4 exercise

  • 1. NAME : CLASS : . DATE : Chapter 4 Interdependence among Living Organisms and The Environment 4.4 Photosynthesis Definition : Photosynthesis is the process in which green plant absorb solar energy (sunlight) to make food from carbon dioxide and water. Oxygen is released as a by-product. Chlorophyll is the green pigment in leaf that can absorb sunlight. The glucose produced during photosynthesis is then converted to starch. Mind map for photosynthesis : KBAT Requirements of photosynthesis : PLANTS NEEDS
  • 2. Lets us carry out experiment how to test for the presence of starch in leaves if photosynthesis take place. ANSWER ALL QUESTIONS. TEST FOR THE PRESENCE OF STARCH 1. Which end product is being tested ? .. 2. What is the purpose of boiling the leaf ? 3. Why is the leaf immersed in alcohol? . 4. State one precaution that must be taken during this experiment ? 5. KBAT A leaf to be tested for starch has to be boiled in alcohol. Why is this done? A. to soften the leaf B. to remove the chlorophyll C. to kill the cells of the leaf D. to dissolve the cell walls