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Heat — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceHeat1 Mark
MCQ
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) We prefer woollen clothes in winter season.
Reason (R) Wool is a poor conductor of heat. It has air trapped in between the fibres.
  • ✓
    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.
✓

Answer

Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) Both A and R are true and R is the correct explanation of A.
Wool is poor conductor of heat. The air gets trapped in between the wool fibres. This air prevents the flow of heat from our body to the cold surroundings.

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