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Unit 11 · The Earth and Universe

Rocks and How They Form

ScienceSubject

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Question 1 of 10

1Rocks are of three kinds: igneous, sedimentary and ......

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Unit 11 topics

Rocks and How They Form Types and Uses of Rock The Solar System and the Planets The Moon and the Lunar Calendar Eclipses

Quick Facts

Unit: 11: The Earth and Universe
Topic: Rocks and How They Form
Domain: Earth & Space

Stone as a written record

Study Tip

Rocks are classified by history, not by appearance. The three groups answer one question, how was this made, and a rock carries no label saying so. Everything in geology is worked out backwards, from what you can see now to what must have happened then.