CBSE Class 7 Geography Air Worksheet

Q1. Explain greenhouse and global warming?

Q2. How does atmosphere affect living beings?

Q3. Explain composition of atmosphere with the help of a diagram?

Q4. Describe structure of atmosphere with the help of a diagram?

Q5. Differentiate between weather and climate?

Q6. What is temperature and insolation?

Q7. How is wind named?

Q8. What is wind? Describe wind systems?

Q9. Describe humidity and precipitation?

Q10. What are the 3 different types of rainfall? Draw diagrams.

Q11. Name some forms of precipitation?

Q12. Fill in the blanks:-

      a) The Air has __% nitrogen and ____% oxygen.

      b) The density of air is higher near_________.

      c) Large jet planes fly in______.

      d) Atmospheric pressure decreases with_________in altitude.

      e) Monsoon winds are called______winds.

       f) Meteors burn and disintegrate in the_______.

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 __________________.