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Hydrosphere Book Back Questions & Answers, Exercises, Solutions, Tests, Quizzes, Videos and Podcasts for Class 9 | Unit 4 | Geography | Social | Samacheer Kalvi – English Medium

Samacheer Kalvi Social New Book Back Questions & Answers: https://www.thelearning.app/samacheer-kalvi-english-medium/class-9/social-4/hydrosphere/exercises

Podcasts: https://www.thelearning.app/samacheer-kalvi-english-medium/class-9/social-4/hydrosphere/videos

Tests & Quizzes: https://www.thelearning.app/samacheer-kalvi-english-medium/class-9/social-4/hydrosphere/tests

Flash Cards: https://www.thelearning.app/samacheer-kalvi-english-medium/class-9/social-4/hydrosphere/flashcards

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00:00 Introduction
00:30 Choose the correct answer
08:17 Assertion and reason
09:54 Match the following

Questions answered in this video –

1. The Sunda Trench lies in the ___________ ocean.

2. The temperature of the ocean waters generally_______ at greater depth.

3. Ocean currents are produced due to _________

4. Consider the following statements. 1. Most of the fishing grounds occur in areas where the continental shelf is wide. 2. Fishing is well developed in warm tropical waters. 3. Mixing of warm and cold currents facilitates plant nutrients for fish. 4.Inland fishing became significant in India.

5. The oceanic ridge comes into existence due to

6. Which of the following indicates the correct sequence of the topography beneath the surface of the sea?

7. Which of the following is not correctly matched?

8. The amount of planktons to be found in the ocean is determined by 1. Depth of the water. 2. Ocean currents. 3. Temperature and Salinity. 4. Length of day and night.

9. (A): Assertion (A): Oceans are always shown in blue in maps… (R): Reason(R): It indicates the natural colour of the oceans

10. (A): Assertion(A): Flat topped seamounts are known as Guyots… (R): Reason(R): All guyot features are of volcanic origin

11. (A): Assertion(A): Submarine canyons are deep gorges on the ocean floor… (R): Reason(R): They are mainly restricted to continental shelf, slope and rise

12. (A): Assertion (A): Atolls are more common in the Atlantic ocean… (R): Reason(R): The marine population at the depth is less

13. Mariana trench

14. Great Barrier Reef

15. Sargasso sea

16. Spring tides

17. Heavy rains

18. Kuroshio current

19. Continental slope

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