The Earth and Its Resources

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Canyon

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A landform created by a fast-moving river.

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Compaction (Chemical)

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A process where sediment is chemically glued together when minerals precipitate from the water they are dissolved in and fill the pore space between compressed sediment.

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Compaction (Physical)

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Squeezing or pressing layers of sediment in the Earth, making them more tightly packed and less space between them.

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Delta

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A landform that is created when a river deposits sediment as it enters a standing body of water such as a lake or ocean.

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Deposition

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When wind, water, or ice drops the sediments that it has been carrying, building up new landforms over time.

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Drought

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A long period of time with less than normal rainfall, leading to a shortage of water.

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Earthquake

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A shaking of the Earth's surface caused by the sudden movement of tectonic plates.

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Erosion

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The process where natural forces like wind, water, or ice slowly move soil and rocks from one place to another.

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Eruption

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When a volcano suddenly releases hot gases, lava, rocks, and ash from deep inside the Earth.

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Flood

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An overflow of water onto land that is often caused by heavy rain, melting snow, or broken dams.