Sulfur dioxide (SO2) can enter the atmosphere naturally during volcanic eruptions and from ocean spray
a. True
b. False
ANSWER: True
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By the principle of ________, the surface feature known as the Grand Canyon is ________ than the sedimentary formations that are exposed in the side walls of the Grand Canyon.
A. inclusion; older B. superposition; younger C. cross-cutting relationships; older D. superposition; older E. cross-cutting relationships; younger
Which evidence from the sea floor shows that tectonic plates move ?
a) The seafloor is youngest near a mid ridge and farther away. b) The seafloor is much older than the continents c) Mid-ocean ridges form the longest range of mountains on earth. d) The seafloor is thinner than continental crust.
The orientation of glacial striations was one of the pieces of evidence that supported
continental drift. Indicate whether the statement is true or false.
Passing through the mantle below the asthenosphere, the seismic wave velocities vary but generally increase until about 2,900-km depth where P waves slow markedly and S waves disappear at the core-mantle boundary zone.
Answer the following statement true (T) or false (F)