Question

Answer these questions by choosing correct option:
(a)Both A and R are true and R is correct Explanation.
(b)Both A and R are true but R is not the correct Explanation.
(c) A is true but R is false.
(d)A is false but R is true.

6. Assertion (A)- The Average temperature of earth is maintained during day and night.
Reason (R) - Atmosphere surrounds the earth as blanket.

7. Assertion (A)- Some communicable disease spread by means of droplets.
Reason (R) - The droplets of saliva secretions may contain millions of bacteria and Viruses.
class 9
please give right answer​

Answer 1

Answer:(6)B,(7)A

Explanation:

Answer 2

The given question can be answered as follows:

Q. Assertion (A)- The average temperature of the earth is maintained during day and night.

Reason (R) - Atmosphere surrounds the earth like a blanket.

• In this question, the answer is (Option a) Both A and R are true and R is the correct Explanation.
• The earth's temperature doesn't show huge fluctuations in the temperature due to the presence of the atmosphere which helps to keep the warmth trapped on earth preventing a sudden drop in temperature after the sun goes down.

Q. Assertion (A)- Some communicable diseases are spread using droplets.

Reason (R) - The droplets of saliva secretions may contain millions of Bacteria and Viruses.

• In this question, the answer is (Option a) Both A and R are true and R is the correct Explanation.
• Droplets can contain infectious organisms like bacteria and viruses which when inhaled by a healthy person can cause them to become diseased as well.