Lithosphere
UNIT 3: Study
Questions
Name ______KEY__________
ACTIVITY 3.00: What are the parts of the Earth’s lithosphere?
1. The “solid” parts of earth are:
a. crust and lithosphere
b. upper mantle and lithosphere
c. crust and upper mantle
d. oceanic crust and continental crust
2. What is the proper order of layers in the Earth starting from the top?
a. upper mantle, crust, lithosphere
b. crust, upper mantle, lithosphere
c. lithosphere, upper mantle, crust
d. crust, lithosphere, upper mantle
3. How thick is the Earth’s outermost layer?
a. 30-40 km
b. 5 -70 km
c. 60-90 km
d. 70-120 km
4. What are the two kinds of crust? _____oceanic__ and ____continental____
5. What is the difference between the oceanic crust and continental crust?
___oceanic crust is a thin layer of dense rock, about 5 km thick. Younger than continental._
___continental crust is thick & less dense, 30-70 im think, and older than oceanic____
________________________________________________________________________
6. What 8 elements are in the layer of crust? Write their names and percentages.
element
|
%
|
element
|
%
|
1. oxygen
|
46.6
|
5. sodium
|
3.63
|
2. silicon
|
27.72
|
6. sodium
|
2.83
|
3. aluminum
|
8.13
|
7. potasium
|
2.70
|
4. iron
|
5.00
|
8. magnesium
|
2.09
|
7. What causes the Earth's plates to move? ____convection currents in the mantle________
8. Why do we have earthquakes?
_____When the crust's plates move they slide past each other, and there is a lot of pressure on the rock. __
____The rocks get stuck, but then they slip and jump, sending shock waves and vibrations through the___
crust - causing earthquakes.