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Geologic Time Scale Crossword

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Across
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Span of time in which specific systems of rocks were formed
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How did the tectonic plate apologize?
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Variation of life forms within or between species
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A scale that divides the history of the earth into meaningful periods
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Large scale movement of organisms of a species to a different environment
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The order and relative position of strata and their relationship to the geologic time scale
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The major divisions of geologic time
Down
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A subdivision of geologic time within an eon.
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A living thing
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The state of living
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Method of dating specimens by analyzing the decay of radioactive isotopes in the rock.
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What do you call a dinosaur who is on time?
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The dying out or extermination of a species
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Changes over time in response to the environment
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A subdivision of geologic time shorter than a period