________ is the rigid, cool outer approximately 100 km of the earth
Fill in the blank(s) with correct word
Lithosphere
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In the year 2006, the U.S. consumed approximately one billion tons of coal. Each ton of coal produces 20 GJ (gigajoules of energy). How much energy was actually put to work?
A. 16% B. 59% C. 84% D. 29%
Given the following generic chemical reaction, which is the product? X ? Y
A) Y is the product. B) X is the product. C) ? is the product. D) Both X and Y are the products. E) Both X and Y are the reactants.
Intense solar heating of the surface may trigger a(n) ____________________ thunderstorm
Fill in the blank(s) with correct word
Most of the livestock grown in North America are
A. Kept in pastures during the summer and barns during the winter. B. Confined in CAFOs. C. Held in pasture year-round. D. Exported to Europe after slaughter. E. Kept in pastures during the day and barns at night.