1.What evidence did Alfred Wagner use to support his theory of continental drift? Cities move further away from each other
2. Why do you think people didn't believe continental drift theory when Wagner first explained it? Because he sounded insane
3. Who were the two scientists that brought forth supporting evidence to Wagner's theory, and what was their evidence? Arthur Holmes Harry Hess
4. What are the three different types of plate boundaries, describe each type?
Divergent boundaries -- where new crust is generated as the plates pull away from each other.
Convergent boundaries -- where crust is destroyed as one plate dives under another.
Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
5. Give an example of a location on Earth where each type of plate boundary is present. Ice land
6. What are the three different types of convergent plate boundaries?
Oceanic-oceanic convergence Continental-continental convergence
Convergent boundaries
7. Give an example of a location on Earth where each type of convergent plate boundaries occurs. Nebraska
8. Explain what plate tectonics and ocean trenches have in common? hat was their evidence? Plate tectonic and ocean trenches have in common the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate called subduction.
9. How old are the rocks off the east coast of North America relative to the rocks right along the mid Atlantic ridge, why do you think this is the case?
Over 4.6 billion years and it’s because the age of the formation of the Earth and the age of the rocks are the same.
10. what is a convection current or cell, describe how it works (use a picture if you want)? A Convection current is the internal movement of the flow of hot fluid in a circular motion caused by heating and cooling
11. What are the two main sources of heat inside the Earth? There are two main sources of heat inside the Earth: radioactive decay and residual heat.
12. What types of tectonic forces create mountains? Three good things that plate tectonics provide for humans are: fertile soils, ore deposits and fossil fuels. Making their plate-tectonic processes.
13. What are horsts and grabens, and where can they be found? Three good things that plate tectonics provide for humans are: fertile soils, ore deposits and fossil fuels. Making their plate-tectonic processes.
14. Describe how the mountains across the Utah and Nevada were formed? It’s an area of large numbers of earthquakes and volcanic eruptions that encircles the Pacific Ocean and it is formed where the Pacific Plate collides with other tectonic plates.
15. What are two bad things that can happen as a result of plate tectonics, how did plate tectonics cause these events? The mountains were formed by the motion of the plates and they could produce earthquakes, volcanoes, tsunamis.... The convection currents cause that plate tectonics can separate because 200 million years ago there was a large continent called “Pangaea” and an enormous ocean Panthalassa.
16. What are three good things that plate tectonics provide for humans, how do plate tectonics provide these things? The mountains were formed by the motion of the plates and they could produce earthquakes, volcanoes, tsunamis.... The convection currents cause that plate tectonics can separate because 200 million years ago there was a large continent called “Pangaea” and an enormous ocean Panthalassa.
Alfred Wagner
Plate boundaries
Sea-floor spreading
Convection
Mountain building
Humans and Plate Tectonics