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- 1. Multiple Choice
Continental Drift
Theory proposed by Alfred Wegener that said all continents were once joined 300 million years ago in a single landmass called Pangaea.
Subduction is when one lithospheric plate descends beneath another
Locations of earthquakes and volcanoes show the plate boundaries and ocean floor features.
continents across the earth Shifted over time.
- 2. Multiple Choice
What are four pieces of evidence for continental drift?
Inner core - Iron Fe, outer core Iron and Nickel, mantle, crust - oxygen O and silicone Si
Fossils, puzzle fit, glacial grooves, rock strata, mountain belts, deep sea trenches, mountain building, new land formation, etc.
Oceanic crust is denser, younger, and thinner than continental crust.
- 3. Multiple Choice
Plate Tectonics
Plate tectonics is the theory that explains how large pieces of the earth's crust, called tectonic plates, move and change shape.
Solid outer layer of the earth that consists of the crust and the rigid upper portion of the mantle.
Subduction is when one lithospheric plate descends beneath another
- 4. Multiple Choice
Two pieces of evidence for plate tectonics?
inner core and outer core
Oceanic crust is denser, younger, and thinner than continental crust.
Locations of earthquakes and volcanoes show the plate boundaries and ocean floor features.
- 5. Multiple Choice
What are the layers of the earth?
Inner core - Iron Fe, outer core Iron and Nickel, mantle, crust - oxygen O and silicone Si
soft layer, hard layer
Mantle , crust
- 6. Multiple Choice
What is the lithosphere
the soft layer of the mantle on which the tectonic plates move.
the strong lower part of the mantle between the asthenosphere and the outer core.
Solid outer layer of the earth that consists of the crust and the rigid upper portion of the mantle.
- 7. Multiple Choice
What is the Asthenosphere
the soft layer of the mantle on which the tectonic plates move.
the strong lower part of the mantle between the asthenosphere and the outer core.
Convection currents in the mantle
- 8. Multiple Choice
What is the Mesosphere
Convection currents in the mantle
the strong lower part of the mantle between the asthenosphere and the outer core.
Solid outer layer of the earth that consists of the crust and the rigid upper portion of the mantle.
- 9. Multiple Choice
What causes the plates to move?
Convection currents in the mantle
Inner core - Iron Fe, outer core Iron and Nickel, mantle, crust - oxygen O and silicone Si
Fossils, puzzle fit, glacial grooves, rock strata, mountain belts, deep sea trenches, mountain building, new land formation, etc.
Convection currents in the mantle
- 10. Multiple Choice
What is the difference between oceanic crust and continental crust?
Oceanic crust is denser, younger, and thinner than continental crust.
its Thicker
Basalt
- 11. Multiple Choice
What lies beneath the lithosphere and is around 200 km thick?
Asthenosphere
Basalt
iron & nickel
asthenosphere
- 12. Multiple Choice
Continental crust is ______ than oceanic crust
7 km
Basalt
Thicker
- 13. Multiple Choice
Oceanic crust is on average how thick?
18 km
2 km
5 km
7 km
- 14. Multiple Choice
A common rock type found within continental crust is called __________.
mid-oceanic ridges and hot spots
granodiorite or granite
iron & nickel
Mantle , crust
- 15. Multiple Choice
A common rock type found within oceanic crust is called _____.
metamorphic
wind and water
basalt
ice
- 16. Multiple Choice
According to plate-tectonic theory Where is new oceanic crust being formed?
mid-oceanic ridges and hot spots
mid-oceanic ridges or divergent margins
iron & nickel
Mantle , crust
- 17. Multiple Choice
Where are melts most likely to be produced by the adiabatic rise of mantle?
mid-oceanic ridges and hot spots
hot spots and outer surface
iron & nickel
- 18. Multiple Choice
The San Andreas fault is a classical_____boundary.
Divergent
crust
Mantle
Transform
- 19. Multiple Choice
The Mohorovičić discontinuity separates the_____ from the _____
crust,
Mantle , crust
volcano
- 20. Multiple Choice
What produces Earth's magnetic field?
volcanic arc setting associated with a convergent margin.
the motion of the fluid outer core produces the Earth's magnetic field
The Pacific plate underlies the Pacific Ocean
- 21. Multiple Choice
The asthenosphere is composed of_____ ____ mantle
Partially melted
Solid
Fully melted
- 22. Multiple Choice
New lithosphere is produced at _____ ____ .
Mid-ocean ridges or divergent margins
Convergent margins
Mid-ocean ridges or divergent margins
- 23. Multiple Choice
Lithosphere is destroyed at
Convergent margins
asthenosphere
Magma
- 24. Multiple Choice
The mesosphere underlies the
asthenosphere
Volcanic arcs
Lava
- 25. Multiple Choice
Mt Shasta and Lassen formed in what kind of tectonic setting?
Crust
Crust and convergent margin
volcanic arc setting associated with a convergent margin.
- 26. Multiple Choice
Beneath arcs at what depth does melting likely occur as a result of dehydration reactions?
About 3 km
About 17 km
About 30 km
about 100 km
- 27. Multiple Choice
What are the four driving forces behind plate motion?
convection, gravitational sliding, slab pull, ridge push
Ice, water, wind, sliding
lava,magma,fire, air
- 28. Multiple Choice
Forearc basins occur between ___________________ __________ and _______________ _____.
subduction complexes, magmatic arcs
convection, gravitational sliding, slab pull, ridge push
subduction complexes, magmatic arcs
- 29. Multiple Choice
What kinds of plate boundaries are found in California?
divergent, transform, convergent
Convergent, land slides, arcs
Magma,lava,landslides
- 30. Multiple Choice
Which of the seven major lithospheric plates consists mostly of oceanic lithosphere?
lake
Pacific
Antarctica
- 31. Multiple Choice
The San Andreas fault separates the _____ plate from the _____ plate
The Pacific plate underlies the Pacific Ocean
Pacific, North American
South Africa, pacific
- 32. Multiple Choice
Where is the Juan de Fuca plate?
The Juan de Fuca plate lies offshore of northern California, Oregon, Washington
The Juan de Fuca plate lies offshore of Las Vegas , Africa , Dc
The Juan de Fuca plate lies offshore of northern California, Ohio, North America
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