Movements of Ocean Water — Syllabus
CBSE · Class 11 · Geography
What Movements of Ocean Water covers in CBSE Class 11 Geography: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Geography syllabus.
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Topics in Movements of Ocean Water
1. Main Movements of Ocean Water
- Ocean water shows both horizontal and vertical motion.
- Ocean currents and waves are horizontal motions of ocean water.
- Tides are vertical motions of ocean water.
2. Waves
- Waves are energy moving across the ocean surface, not the water itself.
- Water particles travel in a small circle as a wave passes.
- Wind provides energy to waves.
3. Tides and Surges
- Tides are the periodical rise and fall of sea level, once or twice a day, mainly due to the attraction of the Sun and the Moon.
- Surges are movement of water caused by meteorological effects such as winds and atmospheric pressure changes.
- Surges are not regular like tides.
4. Types of Tides and Special Tide Conditions
- Semi-diurnal tides have two high tides and two low tides each day, with successive highs or lows of approximately the same height.
- Diurnal tides have one high tide and one low tide each day, with successive highs and lows approximately the same height.
- Mixed tides have variations in height and generally occur along the west coast of North America and on many Pacific islands.
Key Concepts
Central concept: Movements of ocean water are the horizontal and vertical motions of sea water, shaped by waves, tides, currents, and the forces that drive them.
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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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