Dust deposits in the Greenland ice sheet give significant information about past climate change
Indicate whether the statement is true or false
True
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Which of the following currently has the highest energy returned on investment (EROI)?
A) petroleum B) nuclear fusion C) hydropower D) corn-based ethanol E) nuclear fission
Which of the following is not a basic tenet of plate tectonics?
A. When the leading edge of a moving slab of oceanic lithosphere collides with another slab, the older, colder, denser slab turns downward and is pulled by gravity back into the asthenosphere (subduction), while the less-dense, more buoyant slab overrides it. B. The slab pulled into the asthenosphere begins the process of reabsorption into the mantle. C. The new lithosphere slowly moves laterally away from the zones of oceanic crust formation on top of the underlying asthenosphere (seafloor spreading). D. The slab pulled into the asthenosphere begins the process of melting and moves into the liquid core. E. Melted asthenosphere flows upward as magma and cools to form new ocean floor lithosphere.
What is a 20-year flood? What will be an ideal response?
This diagram features a
A) cyclone, southern hemisphere.
B) anticyclone, northern hemisphere.
C) cyclone, northern hemisphere.
D) anticyclone, southern hemisphere.