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6 Cards in this Set

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biosphere
layer of earth that supports life, including land, sea and are
core
the center of the earth, consisting of molten ore [L. cor, the heart]
crust
hard, outer covering of the earth -- 19 to 22 miles thick [L.crusta, covering]
earthquake
movemetn in the earth's crust[O.E. erothe, earth + cwacian, to shake]
mantle
the middle layer of the earth [L. mantellum, a cloak, covering]
volcano
an opening in the earth through which gases, ash, and lava are ejected [L. Volcanus, the god of fire]
[GK. bios, life + sphaira, a globe, circle.
Biosphere = circle of life]