Download 7-1 Inside the Earth RG

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Reading Guide: Chapter 7-1 – Inside the Earth (Pages 190-197)
1.The Earth is composed of several _______________________.
THE COMPOSITION OF THE EARTH
_____ 2. A substance composed of two or more elements is a(n)
a. mix.
c. compound.
b. amalgam.
d. complex.
3. List the three basic layers of the Earth.
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4. What three elements make up most of the Earth’s crust?
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5. Oceanic crust is denser than the continental crust because it contains more of which
three elements?
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6. The mantle is composed of more of the element ______________________ than
the crust is.
7. Why do scientists look to the ocean floor to research the mantle?
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8. The mantle has less aluminum and less ______________________ than the
crust does.
9. What element makes up most of the Earth’s core?
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10. How much of the Earth’s mass is made up by the core?
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THE PHYSICAL STRUCTURE OF THE EARTH
Match the correct description with the correct term. Write the letter in
the space provided.
_____ 11. the outermost, rigid layer of the Earth
_____ 12. a layer of slowly flowing rock in the mantle
_____ 13. the liquid layer of the core
a.
b.
c.
d.
e.
asthenosphere
lithosphere
mesosphere
outer core
inner core
_____ 14. the solid layer of the core
_____ 15. the strong, lower part of the mantle
TECTONIC PLATES
16. Large pieces of the lithosphere that move around on the asthenosphere are called
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17. Why are tectonic plates like the pieces of a jigsaw puzzle?
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18. What are the two kinds of crust that a tectonic plate may contain?
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19. List three ways in which tectonic plates floating on the asthenosphere are similar
to ice cubes filling a punch bowl.
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MAPPING THE EARTH’S INTERIOR
20. Scientists use _______________________________to study Earth’s interior.
21. Seismic waves are _______________________________________________.
22. Why would a seismic wave traveling through a liquid move more slowly than a
seismic wave traveling through a solid?
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