Download Layers of the Earth WebQuest 1. Define the following terms and give

Layers of the Earth WebQuest
1. Define the following terms and give an example of each: (search on your own)
a. Direct observation-
b. Indirect observation-
2. Use the following website to answer the questions below:
http://volcano.oregonstate.edu/earths-layers-lesson-1
a. What are the four main layers of the earth?
b. Why do geologists believe the earth’s interior formed into these layers?
Crust
c. How does the article compare the crust to a piece of fruit?
d. What is the thickness of the crust? Give this as a range from oceanic to continental crust.
e. Define the two types of crust: (click on the words)

Continental-

Oceanic-
f. What are plates?
g. Why do earthquakes occur?
h. What are the two basic rock types in the crust?
i. Why does the continental rock sit on top of the oceanic rock?
j. Define the following terms:

Lithosphere-

Asthenosphere-
k. Draw and label the Lithosphere
Mantle, Outer core, Inner core
l. What causes the mantle to float like asphalt?
m. What does this movement cause to happen?
n. Is the mantle more or less dense than the crust?
o. What is a convection current and how does this effect the crust?
p. Draw the picture of these convection currents above the outer core section.
q. Why is the outer core a liquid?
r. What elements make up the outer core?
s. What is the temperature of the inner core?
t. At this temperature, how can the inner core be a solid?
u. How does the pressure of the inner core compare to that we experience on the surface of
the earth (sea level)?
Use the current website and search others to fill in the chart below:
Layer of the Earth
Crust
Mantle
Outer core
Inner core
Composition
State of matter
Thickness (km)