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Chapters
1.02: Ancient Civilisations
1.03: Early Tamil Society and Culture
1.04: Intellectual Awakening and Socio-Political Changes
1.05: The Classical World
1.06: The Middle Ages
1.07: State and Society in Medieval India
1.08: The Beginning of the Modern Age
1.09: The Age of Revolutions
1.1: Industrial Revolution
1.11: Colonialism in Asia and Africa
2.01: Lithosphere – 1 Endogenetic Processes
2.02: Lithosphere – 2 Exogenetic Processes
2.03: Atmosphere
▶ 2.04: Hydrosphere
2.05: Biosphere
2.06: Man and Environment
2.07: Mapping Skills
2.08: Disaster Management: Responding to Disasters
3.01: Forms of Government and Democracy
3.02: Election, Political Parties and Pressure Groups
3.03: Human Rights
3.04: Forms of Government
3.05: Local Self Government
3.06: Road Safety
4.01: Understanding Development: Perspectives, Measurement and Sustainability
4.02: Employment in India and Tamil Nadu
4.03: Money and Credit
4.04: Agriculture in Tamil Nadu
4.05: Migration
![Samacheer Kalvi solutions for Social Science [English] Class 9 TN Board chapter 2.04 - Hydrosphere - Shaalaa.com](/images/social-science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Social Science [English] Class 9 TN Board chapter 2.04 - Hydrosphere")
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Solutions for Chapter 2.04: Hydrosphere
Below listed, you can find solutions for Chapter 2.04 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Social Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Social Science [English] Class 9 TN Board 2.04 Hydrosphere Exercises [Pages 199 - 201]
Choose the correct answer
The temperature of the ocean waters generally_______ at greater depth.
increases
decreases
remains constant
none of the above
Ocean currents are produced due to ______.
due to rotation of earth
due to variation in temperature
due to earth’s movement
all the above
Consider the following statements.
- Most of the fishing grounds occur in areas where the continental shelf is wide.
- Fishing is well developed in warm tropical watersMixing of warm and cold currents facilitates plant nutrients for fish.
- Inland fishing became significant in India.
1 and 2 are correct
1 and 3 are correct
2,3 and 4 are correct
1,2 and 3 are correct
The oceanic ridge comes into existence due to.
convergence of tectonic plates
divergence of tectonic plates
lateral movements of plates
stearing of plates
Which of the following indicates the correct sequence of the topography beneath the surface of the sea?
Continental shelf-Continental slope-Sea plain-Sea trench
Continental slope-Continental shelfSea plain-Sea trench
Sea plain-Continental slopeContinental shelf-Sea trench
Continental slope-Sea plain-Continental shelf-Sea trench
Which of the following is not correctly matched?
- Gulf Stream - Pacific Ocean
- Labrador current - North Atlantic Ocean
- Canary current - Mediterranean sea
- Mozambique current - Indian Ocean.
Assertion(A), Reason (R) type Questions
Assertion (A): Oceans are always shown in blue in maps.
Reason(R): It indicates the natural colour of the oceans.
Both A and R are correct and R explains A
Both A and R are correct but R does not explain A
A is correct but R is false
A is false but R is correct
Assertion(A): Flat-topped seamounts are known as Guyots.
Reason(R): All guyot features are of volcanic origin.
Both A and R are correct and R explains A
Both A and R are correct but R does not explain A
A is correct but R is false
A is false but R is correct
Assertion(A): Submarine canyons are deep gorges on the ocean floor.
Reason(R): They are mainly restricted to continental shelf, slope and rise.
Both A and R are correct and R explains A
Both A and R are correct but R does not explain A
A is correct but R is false
A is false but R is correct
Assertion (A): Atolls are more common in the Atlantic ocean.
Reason(R): The marine population at the depth is less.
Both A and R are correct and R explains A
Both A and R are correct but R does not explain A
A is correct but R is false
A is false but R is correct
Match the following:
| 1. | Mariana trench | Decreases salinity in the oceans |
| 2. | Great Barrier Reef | Along the coast of Japan |
| 3. | Spring tides | Deepest point in the Pacific |
| 4. | Heavy rains | Australia |
| 5. | Kuroshio current | Second order landform |
| 6. | Continental slope | On full and new moon days |
Answer the following in brief
What do you mean by the term Hydrosphere?
What is hydrological cycle?
Mention the various relief features of ocean floor.
What are the factors that generate the ocean currents?
Write a brief note on sea waves.
Give reasons for the following
The northern hemisphere and the southern hemisphere are called land and water hemispheres respectively.
Continental shelf provides good fishing ground.
Distinguish between Spring tide and Neap tide.
Distinguish between Abyssal plains and Ocean deeps.
Answer in a paragraph
Write a note on continental shelf and continental slope.
What do you mean by ocean currents?
Explain the types of ocean currents.
Explain the influences of the marine resources on mankind.
Solutions for 2.04: Hydrosphere
Samacheer Kalvi solutions for Social Science [English] Class 9 TN Board chapter 2.04 - Hydrosphere
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Concepts covered in Social Science [English] Class 9 TN Board chapter 2.04 Hydrosphere are Introduction of Hydrosphere, Fresh Water, Oceans, Marine Resources, Hydrologic Cycle Or Water Cycle.
Using Samacheer Kalvi Social Science [English] Class 9 TN Board solutions Hydrosphere exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Social Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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