Overview Layers of Earth
Chapter 2
Inner core
Lithosphere
outer core
asthenosphere
mantle
oceanic lithosphere
crust
plasticity
continental lithosphere
ES 7.2 Explain tectonic processes.
SOL ES 7.b
Essential question: What processes are involved in the formation of Earth’s features?
1.
Fill in the chart with the proper terms: inner core, outer core, mantle or crust
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
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Outermost layer
thickness varies
continents are mostly made
up of thin layers of
sedimentary rock that
covers mostly granite-like
rocks and silica
oceanic layer magnesium
and iron

2.



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divided into 2 parts;
asthenosphere and
dense rock
thickest layer
Large convective cells in
the mantle circulate
heat and may drive plate
tectonic processes
iron-magnesium silicates


Liquid iron and
nickel
S waves do not
pass through

Solid iron
and nickel
Describe the differences between oceanic and continental lithosphere. Make sure to identify the differences in
physical and mineralogic characteristics.
3. The composition of some meteorites supports the inference that the Earth's core is composed of
a. aluminum and calcium
b. iron and nickel
c. silicon and oxygen
d. magnesium and potassium
4. Which statement best describes the continental and oceanic crusts?
a. The continental crust is thicker and less dense than the oceanic crust.
b. The continental crust is thicker and more dense than the oceanic crust.
c. The continental crust is thinner and less dense than the oceanic crust.
d. The continental crust is thinner and more dense than the oceanic crust.
5.
6.Use the diagram below to answer the following question.
a. What is the name of the upper plastic-like region of the mantle?
b. Which layer is the lithosphere found in?
7. Place these terms mantle, lithosphere and asthenosphere in order in the chart to show how the layers are actually
arranged.
Surface
Mantle