Question

Q. Measures the following temp. of the following
Take (i) a beaker full of water (ii) a beaker full of soil /sand and (iii) a closed bottle containing a thermometer. Keep them in a bright sunlight for three hours. Now mesaure a temp. of all three vessels. Also, take the temp. reading in shade at the same time.

1. Is the temperature reading more in activity (i) and (ii)?
2. Based on the above filling which would become hot faster - the land or the sea?
3. Is the thermometer reading of the temp. of air (in shade) the same sa the temp. of sand or water? What do you think is the reason for this? And why does the temp. have to be measured in the shade?
4. Is the temp. of air in the closed glass vessel the same as the temp. taken in open air? (i) What do you think is the reason for this ? (ii) Do you ever come across this phenomenon in daily life?

Answer 1

Dear student,

The answers to the questions are as follows :
1. Activity (i) i.e., Water will show more temperature.
2. Sea would become hotter faster.
3. No, due to difference in their specific heats.
4. No, the atmospheric temperature will be more in closed bottle.
(i) This is because the air is trapped inside the bottle and their is no exchange of gases so the temperature will be more.
(ii) During summer season, the air inside a small room gets warmer easily due to which we start feeling suffocated sometimes.

Regards.