Waterfall

Waterfalls form where the river flows over a steep precipice in its course.

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The rock cycle

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Limestone

It is a sedimentary rock with high calcium carbonate content.

Watercourses

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The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes such as...

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Physical properties, as well as the flora and fauna of the ocean change with depth.

Earthquake

An earthquake is one of the most devastating natural phenomena.

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