Assignment of Class- 7 L- 8 (Wind storm & Cyclone )

DCM INTERNATIONAL SCHOOL

CLASS- VII           Sub- Science

Assignment of L- 8( Wind storm and cyclone)

MULTIPLE CHOICE QUESTION ( 1 MARKS EACH)

1. Which one of the following place is unlikely to be affected by a

cyclone.

(i) Chennai (ii) Mangalore

(iii) Amritsar (iv) Puri

2. Which of the statements given below is correct?

(i) In winter the winds flow from the land to the ocean.

(ii) In summer the winds flow from the land towards the ocean.

(iii) A cyclonei s formed by a very high pressure system with very high speed winds revolving around it.- (iv) The coastline of India is not vulnerable to cyclones.

3. An example of natural disaster is :

i. Tsunami ii. Flood iii. Storm iv. All of these

4. Which of the following is most likely to be in the ‘eye’ of a cyclone ?

i. It is an area of high pressure               ii. It is an area of low pressure

iii. It has high speed winds                     iv. It has lots of clouds

5. Which of the following plays an important role in the early warning system.

i. Satellites ii. Moon iii. Helicopters iv. Submarines

6. Which of the following is the best thing to do during heavy lightning ?

i. lie on the ground in an open place.

ii. Go into a water body

iii. Stay indoors, away from metallic doors and windows.

iv. stand under a tall tree.

7. When a vehicle, like a train, moves very fast a/an ..............is created tem temporarily behind it.

i. Low pressure ii. High pressure iii. Eye iv. Cyclone

VERY SHORT ANSWER TYPE QUESTIONS (1 MARKS EACH)

1. What is Anemometer ?

2. What happens to air on heating?

3. Name the scale on which to destructive energy of and earthquake is measured .

4. Define wind?

5. Name two water borne disease.

6. What is the other name of cyclones?

7. Why the leaves of trees or flags flutter when the wind blow?

8. Name the layer of earth in which atmosphere exists?

9. Define pressure.

10. Name two modern technology which help in making a forecast of a cyclones?

SHORT ANSWER TYPE QUESTIONS (2)-

1. Suggest two methods to find out wind direction at a given place.

2. State two experiences that made you think that air exerts pressure

3. You want to buy a house. Would you like to buy a house having windows but no ventil

ators?

Explain your answer.

4. Explain why holes are made in hanging banners and hoardings.

5. Write two reasons for floods to occur.

6. What is tornado?

7. Why hot air goes up?

8. What is monsoon?

9. What is a thunderstone?

10. What is disaster management ?                                                        BY-  Rajan