Match the following; a. The uppermost layer of earth i. Ozone b. Helps in burning candle ii. Carbon dioxide c. Maintenance of oxygen concentration in the atmosphere iii. Oxygen d. 0.03%of the air iv. Oxygen cycle e. Absorption of harmful radiations v. Exosphere

a. Atmosphere is a layer of gases surrounding the earth. It is divided into five layers- troposphere, stratosphere, mesosphere, thermosphere and exosphere. b. Oxygen is around 21% in air. Oxygen helps in burning and respiration. c. Oxygen cycle helps in maintenance of oxygen concentration in the atmosphere. Animals take oxygen and release carbon dioxide during breathing. iv. Carbon dioxide constitute 0.03% of air. During photosynthesis plants absorb carbon dioxide, water in the presence of sunlight produces food and releases oxygen gas. v. Ozone absorbs harmful ultraviolet radiations emitting from the sun. Ozone is present in the troposphere. a. The uppermost layer of earth v. exosphere b. Helps in burning candle iii. Oxygen c. Maintenance of oxygen concentration in the atmosphere iv. Oxygen cycle d. 0.03%of the air ii. Carbon dioxide e. Absorption of harmful radiations i. Ozone

E M B I B E

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 4

EASY

6th CBSE

IMPORTANT

Earn 100

Layer of gases surrounding earth is known as

Important Questions on Air

EASY

6th CBSE

IMPORTANT

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 4

Harmful radiations coming from the sun is known as

EASY

6th CBSE

IMPORTANT

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 4

What is the maintenance of oxygen concentration in the atmosphere known as?

EASY

6th CBSE

IMPORTANT

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 4

Which gas is used by green plants to make their food?

EASY

6th CBSE

IMPORTANT

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 4

Which gas present in the air cannot be used directly by the animals?

HARD

6th CBSE

IMPORTANT

Science Spark>Chapter 16 - Air>Put on your thinking cap>Q 5

Match the following;

a. The uppermost layer of earth	i. Ozone
b. Helps in burning candle	ii. Carbon dioxide
c. Maintenance of oxygen concentration in the atmosphere	iii. Oxygen
d. 0.03%of the air	iv. Oxygen cycle
e. Absorption of harmful radiations	v. Exosphere