Which coal contains the most carbon and is the hottest burning?
a. lignite
b. anthracite
c. bituminous
d. peat
e. subbituminous
B
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Adding more carbon dioxide to the atmosphere causes the concentration of carbonates in the ocean to
A. stay the same because of a positive feedback mechanism. B. increase. C. stay the same because of a negative feedback mechanism. D. decrease.
In the northern hemisphere, ocean currents generally move in a circular pattern. Which of the following describes the direction of this motion in the North Atlantic and in the North Pacific?
A. clockwise in the Atlantic and counterclockwise in the Pacific B. clockwise in the Atlantic and clockwise in the Pacific C. counterclockwise in the Atlantic and counterclockwise in the Pacific D. counterclockwise in the Atlantic and clockwise in the Pacific
What type of plate boundary is depicted in this figure?
A. continental collision B. continental rift C. ocean-continent convergent boundary D. ocean-ocean convergent boundary E. divergent and transform boundaries
What are the three major layers of Earth from its center to its exterior?
a. core (an iron-nickel alloy), mantle (which is composed mainly of peridotite), and crust (with a granitic or basaltic composition) b. core (which is composed mainly of peridotite), mantle (with a granitic or basaltic composition), and crust (an iron-nickel alloy) c. crust (with a granitic or basaltic composition), mantle (which is composed mainly of peridotite), and core (an iron-nickel alloy) d. crust (an iron-nickel alloy), mantle (which is composed mainly of peridotite), and core (with a granitic or basaltic composition) e. mantle (an iron-nickel alloy), core (which is composed mainly of peridotite), and crust (with a granitic or basaltic composition) a. core (an iron-nickel alloy), mantle (which is composed mainly of peridotite), and crust (with a granitic or basaltic composition)