Science Ch. 10 Study Guide
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Created by:
colobiana97 on November 8, 2010
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23 terms
Terms | Definitions |
|---|---|
 eras | second-longest division; marked by significant world wide changes in types of fossils present in rock |
| epochs | characterized by differences in life forms, but differences can be regional rather than global |
| eons | longest subdivision; based on an abundance of fossils |
| periods | based on types of life existing worldwide at a particular time |
| Precambrian | longest part of Earth's history, lasting from 4.0 billion to about 544 million years ago |
| Paleozoic Era | amphibians, reptiles and ferns evolved |
| Cenozoic Era | dinosaurs, birds, and flowering plants appeared |
| Mesozoic Era | humans and large mammals appeared |
| Precambrian Time | worms and jellyfish appeared |
| Triassic Period | the most recent period in Mesozoic Era |
| Cretaceous Period | oldest period in Mesozoic Era |
| Quaternary Period | most recent period in Cenozoic |
| Maiasaura | this dinosaur built nests in which it laid eggs and raised its offspring |
| Archaeopteryx | earliest bird, had wings and feathers; had features no shared with modern birds |
| Gallimimus | fast running animal; could reach speeds of 65 km/h (as fast as a modern race horse |
| Angiosperms | flowering plants, produce seeds with hard outer covering |
| Gymnosperms | are plants that produce seeds but not flowers |
| marsupials | mammals that carry their young in a pouch |
| blue-green | What color are cyanobacteria? |
| oxygen | What do cyanobacteria put in the atmosphere? |
| trilobites | have exoskeleton with 3 lobes; lived in oceans for more than 200 million years |
| natural selection | process by which organisms that are suited to a particular environment are better able to survive and reproduce than organisms that are not |
| in the Paleozoic Era | When was Pangaea formed? |
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