Download plate tectonics

PLATE TECTONICS
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Date:
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WHAT TO DO: Go to this website and find the answers to the questions below.
http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continent
s.shtml
QUESTIONS:
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When was the theory of plate tectonics developed?
What does the theory give answers to (explain)?
How many tectonic plates are there?
What are the names of these plates?
What is the top layer of the Earth's surface called?
What are the 3 types of plate movement?
How fast do the plates move?
How many layers make up the Earth?
Name the Earth’s layers.
What is the center of the Earth called?
What is the difference between the Continental Crust and the Oceanic
Crust?
What are the average ages of the Oceanic Crust and the Continental
Crust?
What is the average thickness of the Oceanic Crust?
What is the major component of the Continental Crust?
What is the average thickness of the Continental Crust?
Click here for an interactive explanation of tectonic plates and continental
drift: http://www.learner.org/interactives/dynamicearth/plate.html