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 |