Question

B. Fill in the blanks.
controls the rate of burning.
gas is necessary for respiration.
3
gas is used to make carbonated drinks and soda water.
is used in weather balloons.
5. Water vapour condenses on
particles and causes rain.
6.
are burned to cook food, generate heat and run vehicles.
7. The blanket of air that surrounds the earth is called the
8.
acts as the medium through which sound travels.​

Answer 1

Answer:

3. carbonic acid.

5 precipitation

6. LPG GAS.

7. Atmosphere.

8. Air.

Answer 2

Explanation:

Friction is a contact force which always opposes the motion