Heat is thermal energy that flows due to
A. calorie imbalance.
B. molecular speed.
C. temperature differences.
D. none of the above
Answer: C
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Which of the following best describes picoheterotrophs?
A) They are anaerobic microorganisms that decompose biomass through fermentation. B) They carry both photosynthesis and chemosynthesis. C) They are common microscopic aerobic decomposers in both terrestrial and marine ecosystems. D) They are minute parasites of many species of terrestrial plants and marine algae.
One potential source of groundwater contamination would be ________
A) partial melting B) evapotranspiration C) lithification D) leaking septic tank
A subsidence inversion develops when:
A) the mixing layer gets deeper. B) the air at the top of the mixing layer gets much colder. C) warming, subsiding air of an anticyclone traps the turbulent zone near the ground. D) air near the ground chills rapidly as radiation is emitted during the night.
What causes magnetic stripes on the seafloor, such as those shown here?
A. Volcanic rocks in oceanic crust are covered by a variable thickness of sediment. B. Some oceanic crust consists of volcanic rocks and some is composed of sediment. C. Some volcanic rocks are formed in normal ways and others have pillows. D. Sometimes Earth's magnetic field points north and sometimes it points south.