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8Sci_PlateTectonics2
Plate Tectonics (Tabat)
| Question | Answer |
|---|---|
| Where would you most likely find evidence of earthquakes throughout Earth's history? | along fault lines |
| What idea does NOT provide evidence for continental drift? | the oceanic plate theory |
| What did Wegener think the one large continent was called? | Pangaea |
| What is the discovery that supports the idea of fossils of the same age and from the same species found on two different continents? | continental drift theory |
| Where has evidence for sea-floor spreading come from? | magnetic minerals on the ocean floor |
| Where does sea-floor spreading take place? | mid-ocean ridges |
| What is a boundary? | the area where two tectonic plates meet |
| What is a convergent boundary? | a boundary that is formed when plates collide |
| What is a divergent boundary? | a boundary that is formed when plates separate |
| What is a transform boundary? | a boundary that is formed when plates slide past each other |
| What have magnetic reversals helped to support? | sea-floor spreading |
| What do plate tectonics support? | the vast majority of earthquakes and volcanic activity in the world occurs along plate boundaries |
| What will landmasses splitting apart most likely cause? | a greater diversity in animal populations |
| If elephants are native to Africa and Asia, what would best explain why elephants are not native to India? | India broke away from Africa 20 million years ago |
| What idea supports continental drift? | fossilized remains of the same plants and animals are found on different continents |
| What type of rock is most closely associated with volcanic activity, plate tectonics & sea-floor spreading? | igneous rock |
| Why was Wegener's Continental Drift Theory not widely accepted by scientists of his time? | He couldn't explain how the continents could move horizontally. He was also a meteorologist, not a geologist. |
| How are magnetic stripes on the ocean floor formed? | Magma wells up at mid-ocean ridges; magma cools; minerals in the igneous rock line up with the magnetic poles creating a striped symmetrical pattern |
| Why are magnetic stripes on the ocean floor significant? | it provides support for theory of sea floor spreading |
Created by:
masonteach
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