Scavenger Hunt
Use the following link on my web page to help you find the answers
http://mediatheek.thinkquest.nl/~ll125/en/crust.htm
1. There are 2 types of crust. What are they?
2. How thick is Oceanic crust?
3. How old can Oceanic crust get?
4. Oceanic rock is made of a rock called Basalt. Describe Basalt.
5. What is the density of Oceanic Crust?
6. How thick is Continental Crust on average below continents?
7. How old can Continental crust get?
8. What is the average density of Continental Crust?
9.What type of rock is the upper part of the Continental crust made of?
Go to the bottom of the webpage and click on Mantle.
10. The mantle is the layer below the crust. How thick is the Mantle?
11. What is the average temperature of the Outer Mantle?
12. What is the average density of the Mantle?
Knowing what you learned last year about density, why does the Continental Crust sit on top of the Mantle?
Scroll down to the section called What influence does the Mantle have. Look at the image on the left. Click on full size below the picture of the planet. Draw a picture of what you see in the space below. Label all features.
The mantle is made of really hot rock that has plasticity, or the ability of solid to move. The arrows show that the plastic-like rock is moving in a circular pattern. What is this current called in the mantle?
Why do the arrows go up at the core and down when they reach the crust?
Click on Plate
Tectonics
Plates that are pulling apart are called what?
Where are these plates creating new ocean floor?
How high do these areas get? (Greylock is 3100 feet)
Plates that come together are called what?
When does subduction happen?
How do crumpled mountains like
the
Look back to questions 2 and
7. Why is it that oceanic crust is so
much younger than continental crust?