The downward movement of soil water contributes to the development of soil horizons
a. True
b. False
Indicate whether the statement is true or false
True
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In order for the social changes to occur that will produce sustainable economies, fully 50% of the population of a country must support the change
Indicate whether the statement is true or false
Which of the following statements about electrons is true?
A) Electrons have a negative charge. B) Electrons are particles. C) Electrons behave like waves. D) Electrons in atoms can be excited by light energy. E) all of the above
Given the implications of the hydrostatic equation, we would expect that
A) pressure be independent of altitude. B) cold, dense air would have a greater vertical pressure gradient than would warm, light air. C) differences in temperature on either side of a cold front should not have any significant effect on upper-level pressure. D) differences in temperature on either side of a warm front should not have any significant effect on upper-level pressure.
Hydrogen fuel cells, biodiesel, and long-term electric batteries are potential solutions to ________
A) reducing carbon emissions from cars and trucks B) carbon sequestration C) cutting back the carbon emissions from hydroelectric plants D) replacing coal as a major fuel for generating electricity E) cap-and-trade emission control