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Experiment No. 17
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Question:
How can you discover if food contains starch? |
Experiments: To test for starch.
Materials:
Method:You will need:
Pipette,
iodine,
celery,
potato,
bread,
three petri dishes.
1. Place a piece of celery, potato and
bread in three different petri dishes.
2. Place the iodine in the pipette.
3. Add a few drops of iodine solution directly to the piece of potato, celery
and bread.
4. Observe and record any changes.
Result:
Foods |
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Dish
1: Potato |
Dish
2: Celery |
Dish
3: Bread |
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| Observations: | The iodine turned from a red/yellow colour to a blue-black colour. | The iodine turned from a red/yellow colour in certain places to a blue-black colour, where starch is stored. | The iodine turned from a red/yellow colour to a blue-black colour. |
Conclusion:
1. If starch is present the iodine turns blue-black.
2. If starch is absent the solution stays a red/yellow colour.
3. The starch showed up in the celery where it is stored.
Sixth Class Experiments
1.
Can
Water Move up a Flower?
2. How
can you show that water moves through the branch of a tree and its leaves?
3. How can you see the roots of a plant grow if they're underground?
4. Can a plant beat an obstacle course and grow towards what it needs?
5. Can you grow your own mould?
7. What causes us to feel breathless?
8. Can you prove that humans breathe out CO2?
11. What happens when Yeast has sugar to feed on?
13. How does the selective barrier in a cell work?
14. Are cells in vegetables damaged when they're cooked?
15. How hard does the heart work?
16. How can you see your pulse?
17. How can you discover if food contains starch?
18. How can you discover if food contains protein?