Earth History 6+7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| extends from Earth's origin to the beginning of human history | geological time
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| based on the kinds of living organisms that existed during four very large chunks of time | era
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| eras are divided into these smaller times that are based on evidence of major events that took place in Earth's crust | periods
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| era between the beginning of Earth and the appearance of the first complex forms of life | Precambrian era
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| the age of ancient life, which ended with the Great Extinction, during which 90% of the species living in the ocean disappeared | Paleozoic era
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| the middle age of life, the time of the dinosaurs | Mesozoic era
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| the age of recent life, during which mammals thrived | Cenozoic era
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| a gap in the rock record; an interruption in the normal sequence of deposition of sedimentary rocks or between sedimentary rocks and other kinds of rocks | unconformity
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| any evidence of past life | fossils
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| Fossils which lived for a relatively short period of time and in many locations that are used to provide information about the age of rock layers | index fossils
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
cbryner1
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