1. Two tins with tight- fitting lids, one painted black and the other white, are taken. Holes are made in the lids to hold thermometers. Equal quantity of boiling water is poured into each tin. The temperatures at various times are noted.
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2. Three different samples of soil having varied particle size are taken. 50 g of each sample is taken in three funnels. 50 ml of water is poured into each funnel. The volume of water dripped from the funnels are observed and noted after it stops dripping from the funnels.
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3. Sanjana measured her pulse rate after sitting quietly for about 10 minutes. She then spends a few minutes running and measured pulse rate as soon as she stopped running. She continued to take her pulse rate every minute until it has reduced to what it was before the running was done.
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Answers
Answer:
Sanjana measured her pulse rate after sitting quietly for about 10 minutes. She then spends a few minutes running and measured pulse rate as soon as she stopped running. She continued to take her pulse rate every minute until it has reduced to what it was before the running was done.
Answer:
1. problem - to investigate which colored tin will absorve more heat
hypothesis- if I pour boling water on the tin then the temperature of the black tin will increse
2. problem- To investigate which soil holds more water'
hypothesis- If pour water into the large soil particles then it will hold more water
3. problem- to investigate if the pulse rate reduces after running
hypothesis- if we run then our pulse rate will increase
Explanation:
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