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

Environmental & Atmospheric Sciences

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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

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

The Mississippi River delta is an example of a ____

A) tide-dominated delta B) river-dominated delta C) wave-dominated delta D) mixed delta

Environmental & Atmospheric Sciences

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%

Environmental & Atmospheric Sciences