The Enhanced Fujita scale has ________ levels and ________ categories
Fill in the blank(s) with the appropriate word(s).
Answer: six; three
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Beneath Earth's surface, where does the heat exchange occur that moves tectonic plates?
A) convection cells
B) continental crust
C) subducting plate
D) mid-ocean ridge
E) ocean trenches
As shown in the Discussion Starter of this chapter, 23% of the 9.6 quadrillion Btu of renewable energy in 2014 came from wood and wood by-products and waste (e.g., sawdust and scraps). Estimate the number of cords of wood that would have the equivalent energy content. State your assumptions.
What will be an ideal response?
Africa South of the Sahara
A. is a wealthy region B. has only one ethnic group C. has a history of democratic government D. is the cradle of the human race
Describe and compare submerged aquatic vegetation and phytoplankton. Where and how does each get nutrients and light?
What will be an ideal response?