Water (Oceans) — Chapter Summary
CBSE · Class 11 · Geography
Summary of Water (Oceans) for CBSE Class 11 Geography. Part of the CBSE Class 11 Geography syllabus. Water is a vital component of life and a rare.
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Overview
Water is a vital component of life and a rare commodity in the solar system. Earth has abundant surface water, so it is called the Blue Planet. The chapter explains how water moves through the hydrological cycle, how oceans are divided and shaped, and how ocean water differs in temperature and salin
Key Concepts
The hydrological cycle is the continuous
The hydrological cycle is the continuous movement of water on, in, and above the Earth through evaporation, condensation, precipitation, runoff, infil
About 91% of planetary water
About 91% of planetary water is found in the oceans, while the rest occurs in glaciers, groundwater, lakes, soil moisture, the atmosphere, streams, an
The ocean floor has four major
The ocean floor has four major divisions: continental shelf, continental slope, deep sea plain, and oceanic deeps.
The continental shelf is the shallowest
The continental shelf is the shallowest part of the ocean floor, with an average gradient of 1° or less, an average width of about 80 km, and depth ra
The continental slope connects the shelf
The continental slope connects the shelf to the ocean basin. Its gradient varies between 2 and 5°, and its depth ranges from 200 m to 3,000 m. Canyons
Learning Objectives
- Understand the hydrological cycle and the global distribution of water.
- Identify the major divisions of the ocean floor and their characteristics.
- Differentiate between major and minor relief features of the ocean floor.
- Explain how temperature varies horizontally and vertically in ocean water.
- Explain salinity, its measurement, and the factors that affect it.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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