Middle School Geography-worksheet on 'Atmosphere and Biosphere'

 'CLASS VII GEOGRAPHY

ATMOSPHERE AND BIOSPHERE'

Q 1 Draw a circle; turn it into a pie diagram indicating the following readings:

1.Nitrogen

2.Oxygen

3.Carbon Dioxide

Q2. Write precise answers to the following questions:

1.What is the main cause of the Sub-Polar Low Pressure Belt?

Ans:________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

2.How many LEVELS are there in Beutfort Scale? Which is the maximum? Which are the two common elements used by Sir Frances Beaufort?

Ans:________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

3.What us the “ Green House Effect”?

Ans:________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

4.What is Biosphere?

Ans:________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

5.Why does a jet plane leaves a white trial?

Ans:________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

Q3. Identify the following: 1.Radio waves are sent back to Earth from which Layer? It is ________________

2.The boundary between the troposphere and stratosphere is _________________

3.The layer which has later of ozone gas is called ________________

4.Mesopause separates Mesosphere from _________________ layer.

5.The outmost layer of the atmosphere is__________________

Q4. Mention on use of the following: 1.Dust in the atmosphere

Ans:________________________________________________________________ ____________________________________________________________________

2.Helium

Ans:________________________________________________________________ ____________________________________________________________________

3.Nitrogen

Ans:________________________________________________________________ ____________________________________________________________________

4.Water Vapour

Ans:________________________________________________________________ ____________________________________________________________________

5.Wind mill

Ans:________________________________________________________________ ____________________________________________________________________

Q5. Draw a circle and draw the following:

1.Draw the main pressure belts.

2.Draw Tropic of Cancer and Tropic of Capricorn

Q6: Given below are the arrows showing directions. Name each one. 6 Marks

1.

2.

3.

4.

5.

6. 5 Marks

Answers

1.__________

2.__________

3.__________

4.__________

5.__________

6.__________

Q7. Mention Names of 5 great scientists who studied atmospheric conditions and made great contributions. Name them and then discoveries. (The one already mentioned in the paper should not be repeated)

1.__________________________________________________________________

2.__________________________________________________________________

3.__________________________________________________________________

4.__________________________________________________________________

5.__________________________________________________________________

6.__________________________________________________________________