Heat Transfer in Nature Class 7 Assertion and Reason Questions

Heat Transfer in Nature Class 7 Assertion and Reason Questions

Heat Transfer in Nature Class 7 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options.

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): Heat transfer in solids primarily occurs through conduction.

(R): In conduction, heat is transferred by the actual movement of particles.

Answer:

(c) A is true, but R is false.

2. (A): The smoke from a burning incense stick rises upward.

(R): Smoke rises because it is warmer and less dense than the surrounding air.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

3. (A): Water can transfer heat through convection.

(R): Convection involves the actual movement of fluid particles.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

4. (A): Woollen clothes are preferred in winter to keep warm.

(R): Wool is a good conductor of heat.

Answer:

(c) A is true, but R is false.

5. (A): The land breeze occurs when cooler air moves from the sea to the land.

(R): The land cools down faster than the sea at night.

Answer:

(d) A is false, but R is true.