Activity 4.2 Let us investigate Do you notice any difference in the sound Class 7

Activity 4.2 Let us investigate Class 7

Activity 4.2 Let us investigate (Pages 45-46) Class 7

Do you notice any difference in the sound produced by these objects?

Answer:

Metal spoon and metal coin produce a ringing sound. On the other hand, coal and wood produce dull sounds.

Conclusion: Metals are sonorous, they produce a ringing sound.

Question 1.

Have you ever observed the vessels used for cooking in the kitchen?

Answer:

Yes, the vessels used for heating are made of metals.

Question 2.

Can you name some metals that are used for making cooking vessels? Do you know why these metals are used for this purpose?

Answer:

Yes, metals like aluminium, copper, and stainless steel are commonly used for making cooking vessels.

These metals are used for this purpose because they are good conductors of heat and quickly transfer the heat they get from the source (like flame of gas) to the things placed in them.