Question | Answer |
Where was the oldest fossil found and how old was it | Australia, 3.5 by
|
What features form at a convergent oceanic-oceanic boundar | trench mountains island arcs
| The East African Rift Valley is formed along what type of plate boundary | divergent
| How long ago did Pangaea exist | 180-300 million years
| What are the names of the four geologic eras | Cenozoic, Paleozoic, Mesozoic, Precambrian
| How do index fossils help determine the age of a rock | infer that rocks must be from same age as fossils
| What organisms dominated life during the Precambrian time | bacteria
| which relative dating law says that the oldest layer is on the bottom | superposition
| what is the half-life of carbon-14 | 5730 years
| how is seafloor spreading different from continental drift | seafloor spreading is the creation of new ocean floor
| who developed the theory of continental drift | Alfred Wegener
| What was missing from Alfred Wegener's proposal of continental drift | mechanism for movement
| What are 5 pieces of evidence that Pangea once existed | coal beds, fossils, puzzle fit, climate, rocks
| What is the force that drives plate tectonics | convection in the mantle
| at which type of plate boundary is crust neither created nor destroyed | transform |