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Cards In This Set
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Geologic time scale
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A record of lime forms and the geologic events in Earth's history
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Eras
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Three long units between Precambrian Time and the present
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Periods
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The subdivision of eras
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Invertebrates
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Animals without back bones
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Vertebrates
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An animal with a backbone
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Amphibian
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An animal that lives part of its time on land and part of its time in the water
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Reptiles
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Creatures with scaly skin and lay eggs with tough, leathery shells
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Mass extinction
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Many types of living things became extinct at the same time
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Mammal
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A warm-blooded vertebrate that feed its young milk
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Ceno
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"recent or new"
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Meso
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"middle"
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Paleo
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"ancient or old"
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Zoic
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"life"
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