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Experiment No. 15
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Question:
How hard does the heart work? |
Experiments: To examine how hard the heart works.
Materials:
Method:You will need:
A plastic container that holds about 150ml,
2 basins,
water,
stop-watch.
With a friend to time you, use a beaker to try to bale water
from one bowl to another, at 70 beakerfuls per minute.
Can you do it?:
If you can, how long can you keep bailing water
at this rate? Your arm muscles soon get tired!
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Find
out more! |
When you are at rest, each heart-beat sends about 150ml (1/3 pint) of blood into the arteries. In an average adult, this happens between 60 and 80 times each minute.
The heart is made from a special muscle called cardiac muscle.
It keeps pumping for an entire lifetime without getting tired!
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?