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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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How old is the Earth? |
4.6 billion years old |
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When did the first organisms come to Earth? |
3.5-3.9 billion years ago |
Younger then the Earth |
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How old is the oldest rock? |
3.9 billion years |
Around the time of the first organisms |
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What is a Paleontologist? |
Scientists that studies ancient life by using fossils. |
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What ancient life do Paleontologists study? |
* kinds of organisms & behaviors * ancient climate & environment * geography of the past |
*3 things |
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What is a trace/marking? |
Footprint or trail |
*Paw print* |
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Wha is an imprint? |
Thin inpression |
*Leaf image* |
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What is petrified wood? |
Minerals/bacteria |
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What is Amber-preserved? |
Tree sap/ice |
*traps the bug* |
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What is relitive dating? |
Can determine a fossils relative age. (No exact age) |
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What is absolute dating? |
Radioactive dating |
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What is in the Precambrian era? |
Jellyfish, worms, corals. (No life first billion years) |
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What is in the Paleozoic era? |
Fish, amphibians, land plants, large mass extinction |
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What is in the Mesozoic era? |
Reptiles, dinosaurs, small mammals (mouse), birds, flowering plants, mass extinction. |
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What is in the Cenozoic era? |
Mammals and birds diversified, major glaciation, woolly mammoth, monkeys, humans. |
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What is Spontanious Generation? |
Life is produced from non living materials |
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What is Biogenesis? |
Organisms that only cone from other living organisms |
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What were modern ideas? |
1) organic molecules formed 2) "soup" was present, including ammonia, methane, and hydrogen gases. 3)"soup" created amino acids. 4) amino acids formed protocells |
*4, "soup"* |
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What happened during the first evolution of cells? |
*First cells were anaerobic (not having oxygen) *Were prokaryotes *later made there own food through chemosynthesis or photosynthesis. |
*3* |
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What was the Endosymbiont theory? |
Organelles probably arose from bacteria living inside other prokaryotes. |
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