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Question
Answer the following question:
What are the factors affecting the height of the waves?
Solution
Waves are formed when winds scrape across the ocean surface. Winds blowing at very high speed form huge waves. An earthquake, a volcanic eruption, and underwater landslides also affect the height of waves. Such phenomena can shift large amounts of ocean water, thereby causing huge waves to be formed.
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Be a Detective
(i) The name of one river is hidden in each of the sentences below. Spot it. Example:
Mandira, Vijayalakshmi, and Surinder are my best friends
Answer: Ravi
(a) The snake charmer’s bustee, stables where horses are housed, and the piles of wood, all caught fire accidentally.
(Hint: Another name for River Brahmputra)
(b) The conference manager put pad, material for reading and a pencil for each participant.
(Hint: A distributary on the Ganga-Brahmputra delta)
(c) Either jealousy or anger causes a person’s fall
(Hint: Name of juicy fruit!)
(d) Bhavani germinated the seeds in a pot
(Hint: Look for her in West Africa)
(e) “I am a zonal champion now” declared the excited athlete.
(Hint: The river that has the biggest basin in the world)
(f) The tiffin box rolled down and all the food fell in dusty potholes.
(Hint: Rises in India and journeys through Pakistan)
(g) Malini leaned against the pole when she felt that she was going to faint.
(Hint: Her delta in Egypt is famous)
(h) Samantha mesmerised everybody with her magic tricks.
(Hint: London is situated on her estuary)
(i) “In this neighbourhood, please don’t yell! Owners of these houses like to have peace”. Warned my father when we moved into our new flat”.
(Hint: colour!)
(j) ‘Write the following words, Marc!’ “On”, “go”, “in”…….. said the teacher to the little boy in KG Class.
(Hint: Rhymes with ‘bongo’) Now make some more on your own and ask your classmates to spot the hidden name. You can do this with any name: that of a lake, mountains, trees, fruits, school items, etc.
Carry on Detective
(ii) With the help of an atlas, draw each river which you discoverd in For fun (i), on an outline map of the world.
Very Short Answer Type Question:
How are tides caused?
Short Answer Type Question:
How are spring and neap tides formed?
Short Answer Type Question:
Write a brief note on Tsunami.
Short Answer Type Question:
Write a note on the importance of water.
Long Answer Type Question:
How do we classify ocean movements? Explain.
