Term
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Definition
| The technique used to find earthquakes. |
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Term
| What is done in triangulation? |
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Definition
| Seismic stations are placed. Each reports to the other how far away the earthquake is. |
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Term
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Definition
| The processes occurring today on the Earth are the sam processes that have occurred throughout the planet's history. |
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Term
| Principe of Superposition |
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Definition
| In undisturbed rock layers, the older rocks beneath the younger rocks. |
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Term
| Number of the Eras of the Earth |
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Definition
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Term
| Establishment of relative rock age |
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Definition
| Fossils/volcanic ash can help with relative date of rocks |
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Term
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Definition
| Radiometric dating can establish an approximate age. |
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Term
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Definition
| 2.5 billion years ago to 570 million years ago. |
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Term
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Definition
1st mountains formed
1st multicellular organisms
O2 appeared in atmosphere |
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Term
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Definition
| 570 million years ago to the present. |
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Term
| Phanerozoic (number of parts) |
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Definition
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Term
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Definition
| 570 million years ago to the 245 million years ago. |
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Term
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Definition
| Permian, carboniferous, devonian, silurian, ordovician, cambrian |
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Term
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Definition
| Trilobites were extremely prevalent (extinct at the end of the ordovician). |
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Term
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Definition
| The 1st land plants, trees, amphibians, insects, reptiles and conifers appeared. Pangea formed. |
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Term
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Definition
| 245 million years ago to 65 million years ago. |
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Term
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Definition
| Triassic, jurassic, cretaceous. |
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Term
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Definition
| "The age of the dinosaurs" |
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Term
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Definition
| Pangea began to break apart. First birds and mammals appeared. |
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Term
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Definition
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Term
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Definition
| 65 million years ago to present. |
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Term
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Definition
| Large modern mammals (including humans) |
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