Which of the following is the smallest unit of heat?
A) calorie
B) Calorie
C) joule
D) kilojoule
C
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Solar energy is becoming more popular recently due to
A. the decline of nuclear power after Fukushima. B. the decreased abundance of natural gas in the United States. C. new technology and the lower cost due to subsidies and tax breaks. D. conflict in the Middle East over oil supplies. E. the rising temperature of the atmosphere.
The Precambrian represents less than 50 percent of Earth history. Indicate whether the statement is true or false
Which of the following are sources of particulates?
A) natural fires B) volcanic eruptions C) wind-blown pollen D) all of these
The lithosphere is sometimes defined as the ________
A) crust and upper mantle B) upper and lower mantle C) lower mantle and outer core D) outer and inner core E) asthenosphere and mesosphere