Photosynthesis Starch Investigation
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Photosynthesis Starch Investigation test
Part 1: Understanding Photosynthesis
What is Photosynthesis?
Photosynthesis is the process by which green plants make their own food using sunlight, carbon dioxide from the air, and water from the soil. During this process, plants produce glucose (sugar) for energy and oxygen as a waste product. The glucose is often stored as starch in the leaves.
Why is Photosynthesis Important?
Photosynthesis is vital for all life on Earth because:
• It produces oxygen that we breathe
• It provides food for plants, which are eaten by animals
• It removes carbon dioxide from the atmosphere
• It forms the base of all food chains
a) _________________________________________________
b) _________________________________________________
c) _________________________________________________
Part 2: Iodine Starch Test Instructions
Safety First! Always wear safety goggles and gloves when handling iodine solution. Never touch iodine with bare hands.
Method:
1. Collect 2-3 different leaf samples from plants in various light conditions (sunny spots vs shaded areas)
2. Label each sample clearly with the plant name and location
3. Your teacher will prepare the leaves by removing chlorophyll (green colour)
4. Place the prepared leaf on a white tile
5. Carefully add 2-3 drops of iodine solution to the leaf
6. Observe any colour changes and record your results
What to Look For:
• Blue-black colour = Starch is present (photosynthesis has occurred)
• Orange/brown colour = No starch present (little or no photosynthesis)
Part 3: Recording Your Observations
Use the table below to record your leaf sample observations during the practical investigation:
| Leaf Sample | Location (Light Exposure) | Starch Test Result (Colour) | Comments |
|---|---|---|---|
Part 4: Analysing Your Results
Part 5: Christian Values and Stewardship Reflection
"The Lord God took the man and put him in the Garden of Eden to work it and take care of it." - Genesis 2:15
a) _________________________________________________
b) _________________________________________________
c) _________________________________________________
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