Bill Nye the Science Guy: Rock and Soil

Bill Nye the Science Guy: Rock and Soil

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All of the rocks in the world used to be

rock called molten rock.

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The pits in the rock were formed by

in liquid rock that came out of a volcano.

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When rocks come out of the volcano on the earth, they can

/pull older rocks.

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Soil comes from dirt which comes from

.

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Igneous, sedimentary, and metamorphic are the three types of

.

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Rocks are always changing, and are part of something we call the

.

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The reason we have volcanoes is because there are plates of rock called

plates, and they are always moving.

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The rock cycle has been going on for

of millions of years.

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Diamond is the

substance known to man, and only diamond will cut diamond.

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The only difference betwen coal and a diamond are millions of years and tons of

.

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Both coal and diamonds are made of

.