A steppe is a vast expanse of semiarid grassland.
a. true
b. false
Ans: a. true
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Explain how and why there are large areas off of the Louisiana coast that support no marine life?
What will be an ideal response?
The author argues that the “hidden subsidy” for automobiles is an example of which of the following?
a) Negative externalities b) Evidence that private transportation pays for itself c) The unseen pollution produced by car exhaust d) The added benefits that private autos provide the economy
Why might there be density changes between different parts of the same layer of the planet?
A) Different materials make up different regions of the same layer. B) Some materials may compress when squeezed by overlying rock. C) Repelling forces may cause some atoms to expand. D) Differentiation is still separating materials into distinct interior layers.
What is the definition of a placer deposit?
A) Sorting of particles by a water current according to a material's specific gravity B) Emplacement of hydrothermal fluids into a fracture C) Concentration of minor amounts of metals in soil via weathering D) Metallic deposit near the base of a black smoker due to precipitation