When coal is burned to generate electricity, 70% of the primary energy in the coal is transformed into unused heat. This means that the energy conversion efficiency from chemical to electrical energy is ________
A) 70%
B) 100%
C) 30%
D) 0%
E) cannot be determined
Answer: C
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The Columbia River volcanic field can be described as ____
a. andesitic stratovolcanoes b. voluminous basalt lava flows c. voluminous rhyolite tuff eruptions d. granite batholiths e. layered mafic intrusions
Choose the option that correctly matches all rock types with their source environments
A) conglomerate: lake bottoms; limestone: sea floor; evaporites: stream deltas B) conglomerate: river bottoms; limestone: lake bottoms; mudstone: lake bottoms C) limestone: river bottoms; conglomerate: sea floor; evaporites: ocean beaches D) limestone: sea floor; evaporites: lake shores; conglomerates: stream deltas
The Mississippi River delta is an example of a ____
A) tide-dominated delta B) river-dominated delta C) wave-dominated delta D) mixed delta
Currently, approximately what percentage of renewable energy consumption is represented by solar power in the world?
A) 50% B) 5% C) 2% D) 20% E) 10%