PowerPoint Presentation - Introduction to Earthquakes EASA-193, Fall 2001

1
Review Chapter 3 Earths Structure
Name _______________________________
Period _______

1. Label Figure 1with A, B, etc..by selecting from
   the list below.

_______
_______

1. Mantle
2. Mesosphere
3. Core
4. Lithosphere
5. Crust
6. Asthenosphere

_______
_______
_______
_______
Figure 1

• What changes occur with depth into the Earth?
  __________________________________________________
  __________________________________________________
  ____________________________________________
• What metals are present in the Core?
  __________________________________________________
  __________________________________________________
  ______________________________________________
• In the outer, liquid layer of the Core
  circulation of this metal believed to create
  Earths magnetic field (circle the correct
  answer).
• A. Iron B. Nickel C. magma D. Silicate
• The outer Core remains liquid due to the (circle
  the correct answer).
• A. temperature B. corn starch C. pressure D.
  water content

2

• The asthenosphere moves because of heat transfer
  by ___________________________ that sets up
  currents.
• Describe the asthenospheres physical properties
  _________________________________________________
  __________________________________________________
  __________________________________________________
  _
• Describe the mesosphere physical properties
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  _________________________
• What metal is abundant in the Crust?
  ___________________________________
• Silicates are abundant in the Crust and are
  compounds made up of silicon, _______________,
  and another element.
• Which layer makes up 82 of the Earths volume?
  (circle the correct answer)
• A. crust B. mantle C. core D. lithosphere
• Describe the lithosphere, what layers of the
  Earth does it contain? ___________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  ________________________________________________
• How does Oceanic Crust differ from Continental
  Crust? ___________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  ________________________________
• From which layer of the Earth does the magma
  that feeds volcanoes come? (circle the correct
  answer)

3

• What type of seismic wave is shown below?
  _________________________________

• What type of seismic wave is shown below?
  _________________________________

1. When a wave passes from one media into another
   encountering a change in density and is bent
   (changes direction). This property is called
   __________________________________________________
   ________________________
2. A person who travels to exotic places and blows
   things up while researching P S waves is
   called? __________________________________________
   _________________________________
3. The energy released by an earthquake is sensed
   and recorded by this instrument
   __________________________________________________
   ___________________

4

• What is happening to the S waves shown below and
  what does this tell us about the outer layer of
  the Earths core? ________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  ___________________________________________

• The Moho is the chemical boundary between which
  2 layers of the Earth? __________________________
  __________________________________________________
  __________________________________________________
  ________________________
• What was the significant outcome of the Molehole
  Project? _________________________________________
  __________________________________
• A shadow zone that occurs during an eatthquake is
  a region on the Earths surface where (circle the
  correct answer)
• A. light is not detected
• B. only P waves are detected
• C. only S waves are detected
• D. no seismic waves are detected.