Term
- The 1st dinosaur were small bipeds
- They ate insects and small vertebrates
- 5 million yrs they had their chance
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Definition
| where did dinosaurs come from |
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Term
- The 1st dinosaur were small bipeds
- They ate insects and small vertebrates
- 5 million yrs they had their chance
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Definition
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Term
- 4600 Million
- 3500 mill
- 545 mill
- 230
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Definition
- origin of earth:
- origin of life?
- 1st fish?
- 1st dinosaur?
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Term
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Definition
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Term
- saurischia (reptile-hipped)
- ornithischia (bird-hipped)
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Definition
| 2 main groups of dinosaurs |
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Term
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Definition
- 2 legged meat eaters
- evolved into birds
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Term
| saurischia: sauropodomorphs |
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Definition
| huge 4 legged plant eaters with long necks and tails |
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Term
| ornithischia: ornithopods |
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Definition
| 2 or 4 legged plant eaters |
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Term
| ornithischia: ceratopsians, ankylosaurs, and stegosaurs |
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Definition
| 4 legged plant eaters with pointy, knobbly bits |
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Term
- Pterosaurs (flying reptiles)
- Ischthyosaurs, plesiosaurs, mosasaurs (in the seas)
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Definition
| another animals in mesozoic |
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Term
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Definition
- dominated for 160 mill
- they lived on continents
- include the biggest land animal ever
- stopped the mammals from evolving
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Term
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Definition
| a giant asterorid killed off dinosaurs and a majority of other species on eart more than ______ |
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Term
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Definition
| an overwhelming amount of evidence shows that a single asteroid about 6 miles in diameter traveling around 43000mph slammed into the ____ |
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Term
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Definition
| evidence for ____at the time of extinction |
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Term
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Definition
| is rare in the earth's crust |
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