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- 1. Multiple Choice
Which world map shows the locations where most earthquakes and volcanoes occur on Earth?
A
B
C
D
- 2. Multiple Choice
Antarctica's location and climate changed over the last 200 million years because Antarctica moved
southward, resulting in a warmer climate
southward, resulting in a colder climate
northward, resulting in a warmer climate
northward, resulting in a colder climate
- 3. Multiple Choice
The large coal fields found in Pennsylvania provide evidence that the climate of the northeastern United States was much warmer during the Carboniferous Period. This change in climate over time is best explained by the
movement of tectonic plates
effects of seasons
changes in the environment caused by humans
evolution of life
- 4. Multiple Choice
Which cross-section diagram of a portion of the crust and mantle best shows the pattern of mantle convection currents that are believed to caused the formation of a mid-ocean ridge?
A
B
C
D
- 5. Multiple Choice
Which evidence causes most scientists to believe that seafloor spreading occurs at the Mid-Atlantic Ridge?
oceanic crust is oldest at the ridge
large sedimentary folds exist in the mantle near the ridge
ocean crust on both sides of the ridge is less dense than continental crust
oceanic crust on both sides of the ridge shows matching patterns of reversed and normal magnetic polarity
- 6. Multiple Choice
Which geologic event occurs most often at mid-oceanic ridge plate boundaries?
magnetic pole reversals and cooling of ocean water
meteorite impacts and tilting of shorelines
hydrospheric pollution and adiabatic heating
earthquakes and volcanic eruptions
- 7. Multiple Choice
The accompanying diagram shows a cross section of a portion of Earth. The inferred motions of crustal plates are shown. Letters A through D represent locations at Earth's surface. Which letter represents the location of the Mid-Atlantic Ridge?
A
B
C
D
- 8. Multiple Choice
The cross section represents the distance and ago of ocean-floor bedrock found on both sides of the Mid-Atlantic Ridge. According to the cross section, every 1 million years, the ocean floor bedrock moves approximately
20 km toward the Mid-Atlantic Ridge
20 km away from the Mid-Atlantic Ridge
40 km toward the Mid-Atlantic Ridge
40 km away from the Mid-Atlantic Ridge
- 9. Multiple Choice
Which cross section best represents the convection currents in the mantle beneath the Peru-Chile Trench?
A
B
C
D
- 10. Multiple Choice
The Mariana Trench was most likely created by the
convergence of the Pacific and Philippine Plates
divergence of the Eurasian and Philippine Plates
sliding of the Pacific Plate past the North American Plate
movement of the Pacific Plate over the Hawaii Hot Spot
- 11. Multiple Choice
The block diagram below shows a tectonic plate boundary. Points A and B represent locations on Earth's surface. Which graph best shows the depths of most major earthquakes whose epicenters lie between A and B?
- 12. Multiple Choice
Compared to the oceanic crust, the continental crust is usually
thicker, with a less dense granitic composition
thicker, with a more dense basaltic composition
thinner, with a less dense granitic composition
thinner, with a more dense basaltic composition
- 13. Multiple Choice
Compared to the oceanic crust, the continental crust is
less dense and more basaltic
more dense and more granitic
less dense and more felsic
more dense and more mafic
- 14. Multiple Choice
The interior of Earth between a depth of 5200 km and 6300 km is inferred to be composed mostly of
silicon and iron
silicon and oxygen
iron and lead
iron and nickel
- 15. Multiple Choice
Which part of Earth's interior is inferred to have convection currents that cause tectonic plates to move?
rigid mantle
asthenosphere
outer core
inner core
- 16. Multiple Choice
What happens to the density and temperature of rock within Earth's interior as depth increases?
density decreases and temperature decreases
density decreases and temperature increases
density increases and temperature increases
density increases and temperature decreases
- 17. Multiple Choice
The accompanying map shows the Atlantic Ocean divided in zones A, B, C and D. The Mod-Atlantic Ridge is located between zones B and C. Which graph best represents the geologic age of the surface bedrock on the ocean bottom?
- 18. Multiple Choice
Which map best represents the pattern of magnetic polarity in the minerals of ocean-floor bedrock on each side of the Mid-Atlantic Ridge?
- 19. Multiple Choice
Base your answer to the following question on the cross section below, which shows a portion of Earth's crust and upper mantle near a mid-ocean ridge.
igneous rock with normal magnetic polarity
igneous rock with reversed magnetic polarity
sedimentary rock with normal magnetic polarity
sedimentary rock with reversed magnetic polarity
- 20. Multiple Choice
The map shows the continents of Africa and South American, the ocean between them, and the ocean ridge and transform faults. Locations A and D are on the continents. Locations B and C are on the ocean floor. The hottest crustal temperature measurements would most likely be found at location
A
B
C
D
- 21. Multiple Choice
The map shows the continents of Africa and South American, the ocean between them, and the ocean ridge and transform faults. Locations A and D are on the continents. Locations B and C are on the ocean floor. Which table best shows the relative densities of the crustal bedrock at locations A, B, C, and D?
- 22. Multiple Choice
The map shows the continents of Africa and South American, the ocean between them, and the ocean ridge and transform faults. Locations A and D are on the continents. Locations B and C are on the ocean floor. Which graph best shows the relative age of the ocean-floor bedrock from location B to location C?
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