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Physical Geology Practice Test | Latest
2026–2027
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, What is the difference in thickness and composition Continental crust is thicker and less dense, primarily composed of granitic
between continental crust and oceanic crust? rocks, while oceanic crust is thinner and denser, primarily composed of basalt.
Which layer of the Earth is similar to the composition of The continental crust is similar in composition to granite.
granite?
Which layer of the Earth is similar to basalt? The oceanic crust is similar in composition to basalt.
Which layer of the Earth is similar to the green mineral The upper mantle is similar in composition to the green mineral olivine.
olivine?
Which layer of the Earth is similar in composition to an The inner core is similar in composition to an iron-nickel meteorite.
iron-nickel meteorite?
Are some layers stronger than others? Yes, the lithosphere (crust and upper mantle) is stronger than the underlying
asthenosphere.
Why do some regions have high elevations? High elevations are often due to tectonic processes such as mountain building,
volcanic activity, or the collision of tectonic plates.
Where does the heat come from that controls the The heat comes from the decay of radioactive isotopes and residual heat from
internal processes of the Earth? the Earth's formation.
What do sediments look like along a steep mountain Sediments along a steep mountain front are typically large, angular blocks due
front? to erosion.
What do sediments look like in sand dunes? Sediments in sand dunes are fine, well-sorted grains that are typically rounded.