Air And Atmosphere

Question 1

Fuel

Answer 1

Any chip material which burns in air or oxygen with the release of large amount of heat energy and light energy without the formation of harmful products to the environment and life is called fuel.

Question 2

Combustion

Answer 2

The process of burning of fuel in the air with the release of large amount of heat energy and light energy is called combustion

Question 3

Respiration

Answer 3

The collective process of absorption of oxygen from the air into the blood stream and then oxidation of food materials in the cells with the release of heat energy carbon dioxide and water in the exhaled air is called respiration.

Question 4

Rusting

Answer 4

The slow conversion of iron into its hydrated iron oxide in the presence of moisture and air.

Question 5

Rust

Answer 5

The hydrated iron oxide formed on the surface of iron is called rust

Question 6

Photosynthesis

Answer 6

The process due to which the plant leaves absorb carbon dioxide gas from the atmosphere and in the presence of water, chlorophyll and sunlight converted to glucose (sugar) and oxygen is called photosynthesis