Composition and Structure of Atmosphere
1. Multiple choice questions.
(i) Which one of the following gases constitutes the major portion of the atmosphere?
(a) Oxygen (c) Argon
(b) Nitrogen (d) Carbon dioxide
Answer:
(ii) Atmospheric layer important for human beings is:
(a) Stratosphere (c) Troposphere
(b) Mesosphere (d) Ionosphere
Answer:
(iii) Sea salt, pollen, ash, smoke soot, fine soil — these are associated with:
(a) Gases (c) Water vapour
(b) Dust particles (d) Meteors
Answer:
(iv) Oxygen gas is in negligible quantity at the height of atmosphere:
(a) 90 km (c) 100 km
(b) 120 km (d) 150 km
Answer:
(v) Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?
(a) Oxygen (c) Helium
(b) Nitrogen (d) Carbon dioxide
Answer:
2. Answer the following questions in about 30 words.
(i) What do you understand by atmosphere?
Answer:
(ii) What are the elements of weather and climate?
Answer:
(iii) Describe the composition of atmosphere.
Answer:
(iv) Why is troposphere the most important of all the layers of the atmosphere?
Answer:
3. Answer the following questions in about 150 words.
(i) Describe the composition of the atmosphere.
Answer:
(ii) Draw a suitable diagram for the structure of the atmosphere and label it and describe it.
Answer: