I NAME THE FOLLOWING:
a. An artificial enclosure for keeping small house plants: ________________
b. World Water Day is celebrated on this day: _________________
c. The amount of salt in grams present in 1000 grams of water: _____________
d. Tsunami struck havoc in the Indian Ocean on this day. __________________
e. The process by which water continually changes its form and circulates between
oceans, atmosphere and land: _____________________
f. The deepest hyper saline lake in the World: ___________________
II FILL IN THE BLANKS:
a. Huge tidal waves are known as ______________
b. When the water on the surface of the Ocean rises and falls alternatively, they are called ______________
c. ‘Tsunami’ is a Japanese word which means _____________________
d. The Labrador Ocean current is a _______ current.
e. Warm Ocean currents originate near the ________________ and move towards the ___________
f. The ____________________ in the Andaman and Nicobar islands got submerged after the Tsunami of 2004.
g. Water vapour condenses to form ____________.
h. _______________________ of the earth’s surface is covered by water.
i. The largest tsunami ever measured was about __________ high.
j. ___________of water found on Earth is saline water.
k. Dead Sea in Israel has salinity of ___________ per litre of water.
l. The Gulf Stream is a _________ Ocean current.
m. __________________ help in navigation.
n. Coastal areas of Japan and the eastern coast of North America are famous for the best ______________________ of the World.
MATCH THE FOLLOWING:
COLUMN A COLUMN B ANSWERS
1 Tides A Deepest hyper saline lake 1-
2 Ocean Currents B Warm current 2-
3 Dead Sea C Cold current 3-
4 Caspian Sea D Periodic rise and fall of water 4-
5 Gulf Stream E Streams of water 5-
moving in definite paths
6 Labrador Ocean F Largest lake 6-
IV ANSWER THE FOLLOWING QUESTIONS:
1. Why do we face water scarcity even though three-fourth of earth is covered by water?
2. How can we measure salinity of water?
3. What are Waves? How are they formed?
4. Differentiate between tides and Ocean currents.
5. How Dead Sea of Israel differ from other water bodies?
6. Distinguish between warm current and cold current.
7. Mention the advantages of Tides.
8. Distinguish between Spring tide and Neap tide.
9. Explain Water Cycle.
10.What is the significance of Ocean Currents?
11.Write a short note on Tsunami.
Please click on below link to download CBSE Class 7 Social Science Water Worksheet Set A