An interrelated collection of plants and animals and the physical environment with which they react is a(n)
A) biome.
B) ecosystem.
C) biomass.
D) biosphere.
Answer: B
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Jatropha is a good source for biodiesel because
A. It is readily available worldwide B. It's leaves are easily combustible C. It grows in most climate zones D. It's nuts have a high energy content E. It will grow in sun or shade
Since the 1920s, hydropower production has
A. Risen, but not as fast as fossil fuel use B. Fallen due to a lack of available sites C. Stayed at about the same level D. Become our most important energy source E. Fallen due to disinterest
Sand covers approximately 75 percent of the world's deserts
Indicate whether the statement is true or false
In an aqueous solution thee [OH-] is 1.0 x 10- 6 M. What is the [H+]?
A) 1.0 x 10^-9 M B) 1.0 x 10^-8 M C) 1.0 x 10^- 6 M D) 1.0 x 10^8 M