Question:
How are high tides important?[V. Imp.]
Answer:
High tides are important for various reasons:
- They help in navigation
- The raise the water level close to the shores. This helps the ships to arrive at the harbour more easily.
- The high tides also help in fishing. Many more fish come closer to the shore during the high. This enables the fisherman to get a plentiful catch.
- The rise and fall of water due to tides is being used to generate electricity in some places.
Water
Q 1.
What is the significance of World Water Day?
Q 2.
What happened to the Indira point during the tsunami of 2004?
Q 3.
How are spring and neap tides formed.
Q 4.
Answer the following questions briefly.
(a) What is precipitation?
(b) What is water cycle?
(c) What are the factors affecting the height of the waves?
(d) Which factors affect the movement of ocean water?
(e) What are tides and how are they caused?
(f) What are ocean currents?
Q 5.
What do you mean by salinity? [V. Imp.]
Q 6.
Give reasons:
(a) Ocean water is salty.
(b) The quality of water is deteriorating.
Q 7.
Write a note on the importance of water. [V. Imp.]
Q 8.
Which type of water do the ocean bodies and the seas contain?
Q 9.
What is the salinity of Dead sea?
Q 10.
How are tides caused?
Q 11.
What is the average salinity of the oceans?
Q 12.
What happens during low tide?
Q 13.
What happens during high Ode? [Imp.]
Q 15.
What is Tsunami? [V. Imp.]
Q 16.
Name one warm curreht and one cold current.
Q 17.
How do we classify ocean movements? Explain. [V. Imp.]
Q 18.
Why do swimmers float in Dead Sea?
Q 19.
Write a brief note on Tsunami.
Q 20.
How are high tides important?[V. Imp.]
Q 21.
What are waves? Write a short note on it
Q 22.
Give an account of ocean currents. [Imp.]
Q 23.
Explain water cycle with a neat and labelled diagram.
Q 24.
For Fun
Be a Detective
1. The name of one river is hidden in each of the sentences below. Spot it. Example: Mandira, Vijayalakshmi and Surinder are my best friends
