Level 64
1 day < 1 min
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Landforms and Major Physical Regions

Oceans, Rivers, and Hydrology

An exploration of the water systems that shape Earth's surface: the oceans and their currents, the great rivers and lakes of the continents, and the ice and groundwater that sustain them.

60-Second Review

Express review

A condensed, point-by-point summary of the module, for reviewing right before a test or exam.

  1. The Ocean Basins and the Seafloor. Five vast ocean basins and the seafloor terrain of shelves, ridges, trenches, and reefs.
  2. Currents, Circulation, and El Nino. Wind-driven surface currents, deep thermohaline circulation, upwelling, and the El Nino-La Nina cycle.
  3. Tides, Waves, and Sea Level. Lunar and solar tides, wind-driven waves, tsunamis, and the causes of changing sea level.
  4. Salinity and the Water Cycle. Ocean salinity patterns and the continuous cycling of water between ocean, atmosphere, and land.
  5. The World's Great Rivers. The major river systems of every continent, their basins, deltas, landforms, and waterfalls.
  6. Lakes, Aquifers, and Karst Hydrology. Closed drainage basins, lake types, groundwater aquifers, and landscapes shaped by dissolving rock.
  7. Ice, Water Stress, and Transboundary Conflict. Ice sheets and glaciers, their retreat, and the growing pressures of water scarcity and shared rivers.

This module continues after "Foundations of Physical Geography" in the syllabus. If you haven't reviewed it yet, it may help set the context.

Key points

Visual module map

1The Ocean Basins and the Seafloor
2Tides, Waves, and Sea Level
3Salinity and the Water Cycle
4Lakes, Aquifers, and Karst Hydrology
5Ice, Water Stress, and Transboundary Conflict

Alternative visual view: a simplified sequence of some of the module's key points, in their order within the syllabus.

Your module mastery

0% (overall measurement)
Approximate breakdown by skill
Understanding of historiographical debate0%

A rough estimate based on the key points reviewed, not an exact measurement of actual mastery.

Final test

You need to review all key points to unlock the final test.

Optional mini-games

Extra practice, with no penalty, to reinforce the module's content.

Review Flashcards

Review each key point with cards that flip to reveal the summary.

Memory

Match each concept with its definition in as few attempts as possible.

Time Attack

Answer true or false statements before time runs out.

Chronological Order

Put the module's key points back in their original order.

Further reading

Bibliography and cited sources used to create this module.

  • Trujillo, A. P. and Thurman, H. V. (2021). Essentials of Oceanography (13th ed.). Pearson.
  • USGS. "The Water Cycle." USGS Water Science School. https://www.usgs.gov/special-topics/water-science-school/science/water-cycle
  • USGS. "Where is Earth's Water?" USGS Water Science School. https://www.usgs.gov/special-topics/water-science-school/science/where-earths-water