Question

Q.4. Answer in one sentence each. (Any 4)
1. What is meant by reflection of light?
2. What is meant by compression?
3. Name the source of heat?
4. Where the calorimeter is used?
5. From where did the sound is produce in humans?​

Answer 1

Question 1:

What is meant by reflection of light?

Answer:

The process of bouncing back off the light rays which fall on the surface of an object is called reflection of light.

Question 2:

What is meant by compression?

Answer:

Compression is the region in a longitudinal wave where the particles are closest together.

Question 3:

Name the main source of heat?

Answer:

The main source of heat is the Sun.

Question 4:

Where the calorimeter is used?

Answer:

A calorimeter is an device used for calorimetry, or the process of measuring the heat of chemical reaction or physical changes as well as heat capacity.

Question 5:

From where did the sound is produce in humans?

Answer:

In humans sound is produced by the vioce box or larynx. It is the upper part of the wind pipe.

Note:-

Here I have given all the answers . But The 3 no. Question I have just changed the Question as there are many sources of heat . If you are asking one then the Question should be main source of heat. Then the answer will be sun but if you want all the sources of heat then the required answer will be oil , coal , electricity etc.

Happy Learning!!