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Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Geology

sierra

Earth science; Geology

A high, rugged group of mountains that has an irregular outline somewhat like the teeth of a saw.

taiga

Earth science; Geology

A forest located in the far northern regions, just south of the tundra. The taiga is a kind of biome.

stalactite

Earth science; Geology

An icicle-shaped accumulation of dripstone hanging from cave roof.

strait

Earth science; Geology

A narrow passage of water that joins two larger bodies of water. The strait of Gibraltar connects the Mediterranean Sea with the Atlantic Ocean.

stratum

Earth science; Geology

A layer of rock or other material. A rock stratum looks different from the rock strata above and below it.

strip mine

Earth science; Geology

A mine that is dug in strips at the surface of the Earth, rather than being dug deep underground.

volcano

Earth science; Geology

A vent in the surface of the Earth, from which lava, ash, and gases erupt, forming a structure that is roughly conical.