EARTH SCI REVIEW

1. L.O: DYNAMIC CRUST,
EARTHQUAKES, EARTH’S INFERRED
INTERIOR & PLATE TECTONICS.

2. The crust is the outer-most layer of the
lithosphere.
• Most of the crust is made of two elements
oxygen and silicon.
• There is two kinds of crust: continental and
oceanic.
• Continental crust is felsic, made of granite,
thicker and low density (2.7g/cm3)
• Oceanic crust is mafic, made of basalt, thinner,
high density (3.0 g/cm3)

4. The crust is the outer-most layer of the
lithosphere.
• page 1 of ESRT has info about crust’s
composition.
• page 1 of ESRT has info about crust’s
composition.
• Complete page 42-43 in your workbook.

5. The crust is dynamic, constantly
changing.

6. The Earth’s crust has many fault zones-
cracks in its surface.

7. Most of Earth’s crustal activity happen
around the fault zones.

8. earthquakes, mountain-building and
volcanoes all happen around the fault
zones.

9. The rock strata of EARTH’S crust
continually changes

10. The rock strata of EARTH’S crust undergoes
tilting, folding, faulting, uplift and
subsidence

11. faulting

12. folding

13. On the regents I will sequence rock
layers

14. I must be able to tell which event
happened when.

17. EARTHQUAKES

18. EARTHQUAKES
IS A SUDDEN MOVEMENT OF EARTH
ALONG A FAULT OR BREAK IN THE
EARTH.

19. SEISMIC (EARTHQUAKE) WAVES ARE
GENERATED WHEN AN EARTHQUAKE
HAPPENS.

20. P-WAVES AND S-WAVES ARE GENERATED
WHEN EARTHQUAKES HAPPEN.

21. P-WAVES travel faster than S-WAVES.
Thusly, P-WAVES always arrive first to
an earthquake detection station.

22. The difference between the P-WAVES
an S-WAVES arrival times is used to
determine the earthquake’s epicenter.

23. 12 minutes – 6 minutes= 6 minutes.

24. Three seismograms are used to
triangulate the location of an
earthquake’s epicenter.

25. Open your workbook to page 122.
complete the questions.

26. The inferred properties of the Earth’s
interior.

27. The interior properties of Earth’s
interior are inferred from studying .
• Seismic wave behavior
• The composition of meteorites

28. P-waves can pass thru solids and
liquids. S-waves solid only.

29. The outer core is inferred to be liquid
because of the shadow zones, where no S-
waves are detected.

30. COMPLETE PAGE 115-121

31. PLATE
TECTONICS:
The theory of continental drift says that the
continents have moved into their present

32. evidence of continental drift (crustal
plate motion).
• The continents look like a jigsaw puzzle.
• Rock layers and fossil on different continents
match.
• Sea floor spreading

33. The theory of plate tectonic explains
earthquakes, volcanoes, mountain
ranges and the cause of continental
drift.

34. The Earth’s crust is made of huge
plates that move.
Movement at the plates cause
earthquakes, volcanoes, mountains
and continental drift.

35. The crustal plates can move in three
ways: (three kinds of boundaries
between plates)

36. Convergent plate boundary
(subduction zone)

37. Subduction zone (convergent
boundary)

38. Subduction zone (convergent
boundary)

39. Two transform plate boundarys

41. Seafloor spreading: why the
continents drift

42. At the mid-atlantic ridge, new crust is being
created. The new crust pushes away old
crust.

43. As the old crust is pushed away, the
continents are pushed too.

44. the oldest crust is at the continental
shelf, the youngest crust at the mid-atlantic
ridge..

45. Evidence of new seafloor formation is the alternating
pattern of reverse and normal polarity of mineral
alignment in the seafloor crust.

46. Convection currents in the Earth’s
asthenosphere power continetal drift (
earthquakes, plate tectonics etc0

49. Complete page 65 of green workbook