What occurs at mid-ocean ridges?
A. oceanic crust is created
B. continental crust is created
C. continental crust is destroyed
D. oceanic crust is destroyed
E. all crust is destroyed by magma
Answer: A
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Indicate whether the statement is true or false.
A cubic centimeter each of quartz, olivine, and native gold weighs 2.5, 3.0, and 19.8 grams, respectively. These weights indicate that ________
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What are the principal gaseous components of Earth's atmosphere? Where do scientists believe these gases originated?
What will be an ideal response?
Dam removal in the U.S. ________
A) is controversial because dams provide such good habitats for native species B) will assist with our transition to more natural forms of renewable energy C) will probably increase rapidly as we move to a more fossil-fuel-dependent society D) will probably continue because the environmental impacts of dams are reviewed periodically E) provides many new jobs and opportunities and so is economically beneficial