CBSE Class 7 Geography Air Worksheet Set B

CBSE Class 7 Geography Worksheets (11) - Air. Revision worksheets, Sample papers, Question banks and easy to learn study notes for all classes and subjects based on CBSE and CCE guidelines. Students and parents can download free a collection of all study material issued by various best schools in India. The study material has been carefully compiled by the best teachers in India. The students should practice the questions database to get better marks in examination. Please refer to other links for free download of high quality study material. Based on CBSE and CCE guidelines. Based on the same pattern as released by CBSE every year. Study material for final/ term/ SA1/ SA2 Examinations conducted by various schools affiliated to Central Board of Secondary Education (CBSE) in India and abroad. CBSE Study material has been compiled to help students preparation which will helps the students to concentrate more in areas which carry more marks.



CLASS VII Chapter 4 (AIR)

I. Choose the correct answer.

1. Our atmosphere is divided into ________________ layers.

(a) 5                     (b) 4                           (c) 8

2. _____________________ measures the temperature.

(a) Barometre        (b) Thermometer          (c) Rain Gauge

3. In _________________ temperature rises, very rapidly with increasing height.

(a) Thermosphere  (b) Troposphere            (c) Stratosphere

4. Green plants produce __________________ during photosynthesis.

(a) Nitrogen           (b) Carbondioxide         (c) Oxygen

5. The uppermost layer of the atmosphere is known as ________________.

(a) Stratosphere     (b) Exosphere              (c) Troposphere

6. _________________ is the second most plentiful gas in the air.

(a) Nitrogen            (b) Oxygen                  (c) Carbondioxide

7. Almost all the weather phenomena like rainfall, fog and hailstorm occur in ________

(a) Stratosphere      (b) Troposphere           (c) Exosphere

8. _________________ helps in radio transmission.

(a) Troposphere       (b) Exosphere             (c) Thermosphere

9. Mesosphere the third layer of the atmosphere extends up to the height of ______ km

(a) 80                      (b) 50                        (c) 100

II. Fill in the blanks

1. Cold air is denser and _________________. That is why it tends to sink down.

2. _____________, ______________, _______________, _______________, ______________ are the five layers of atmosphere.

3. On the Celsius scale the water freezes at ____________ and boils at _____________.

4. ________________ need nitrogen for their survival.

5. Radio waves transmitted from the earth are reflected back to the earth by __________________.


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