The thickness of Earth's crust ranges from
A) 70 km to 250 km (43 mi. to 155 mi.).
B) barely 1 km to 2900 km (0.62 mi. to 1800 mi.).
C) the surface to an unknown depth.
D) 7 km to 250 km (4 mi. to 155 mi.).
E) 5 km to 60 km (3 mi. to 37 mi.).
E
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What region of a continental margin blends into the deep-ocean basin?
a. Continental slope b. Continental shelf c. Continental basin d. Continental rise e. Continental plain
Chlorofluorocarbons
A) have decreased in concentration in the atmosphere since the implementation of the Montreal Protocol. B) are a common component of volcanic gases. C) cause increased levels of harmful ozone in the stratosphere. D) typically stay in the atmosphere for approximately six months. E) are naturally occurring compounds.
Which of the following illustrates how humans are using fog as a resource?
A) Electronic freeway signs in California's central valley warn of fog hazards. B) Gliders utilize winds from morning glory clouds for recreational purposes. C) Residents in the Atacama Desert in Chile use nets to intercept advection fog. D) Sand beetles harvest moisture from fog in the Namib Desert.
National pride, scientific curiosity, and various advancements in shipbuilding fueled the golden age of polar exploration much like the spread of commerce fueled the original golden age of exploration
Indicate whether the statement is true or false