CBSE Class 7 Social Science Geography Water Worksheet

Very Short Answer Type Question

Question. Why is the ocean water salty?
Answer : Several mineral salts get dissolved in the ocean water. Due to this the ocean water is salty.

Question. Explain the route of Gulf Stream current.
Answer : The Gulf Stream starts from the Gulf of Mexico and it reaches to the Islands of Newfoundland.

Question. What do you understand by Tsunami?
Answer : ‘Tsu’ means coastal and ‘Nami’ means long waves of water. The Tsunami are the long waves of water striking to the coastal areas.

Short Answer Type Question

Question. Differentiate between warm water ocean current and cold water ocean current.
Answer : The temperature remains high in Equatorial regions but lower in Polar Regions. The currents going away from the Equator are always warm. Whereas, the currents coming from the poles are always cold.

Question. Tide is very useful for ships. How?
Answer : Due to the tide, the deposits of soil against the mouth of the river, washed away. Thus, the soil do not get deposited on the harbours and ships can sail up to a great distance inside.

Question. Why does the Gulf Stream affect the climate of Europe?
Answer : 1. Due to the warm water of Gulf Stream the glaciers moving from the poles melt and do not create obstruction to ships after reaching down.
2. The ports of European countries remain open even in winter season due to its warm water.

Question. Write down a case study of a place that is affected by Tsunami.
Answer : On December 26, 2004, a most powerful Tsunami occurred on the coast of Indian Ocean. This brought devastation in 11 countries. More than 2 lakh people were killed and many more were rendered homeless. Tamilnadu, Kerala, Andhra Pradesh and Pondicherry etc. states suffered the most in India.

            Very Short Answer

Q1)      Define water cycle?

Q2)      What is salinity?

Q3)      Which ocean current is cold and warm?

Q4)      When we celebrate world water day?

Q5)      What is terrarium?

            Short Answer

Q6)      What are ocean currents?

Q7)      Distinguish between waves and tides?

Q8)      What do you mean by the term ocean circulation?

Q9)      How spring tides are different from heap tides?

Q10)    What do you mean by water bodies distribution?

            Long Answer

Q11)    State the difference between waves and ocean current?

Q12)    Explain why is water important to us?

Q13)    Write short note on tsunami?

Q14)    State the difference between ocean current and tides?

Q15)    Explain the factors affecting the ocean current?

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