Provide three types of evidence supporting the idea of seafloor spreading along the mid-oceanic ridge in the Atlantic
What will be an ideal response?
Answer: No "old" sediments in the mid-Atlantic; sediments are younger with greater distance from the mid-ocean ridge; paleomagnetic data show "stripes" of accordant age on either side of the ridge.
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About ________ people migrated from Europe to the United States between 1821 and 1920
A) 55 million B) 33 million C) 18 million D) 21 million E) 15 million
Give two safety rules for tornadoes
What will be an ideal response?
How do slumps and translational slides differ?
A) translational slides are more damaging B) slumps are more damaging C) slumps are rotational, while translational slides are planar D) slumps create debris flows, while translational slides do not
What are the four challenges to turning the vision of hydrogen fuel into a reality?
What will be an ideal response?