Productivity is the amount of carbon fixed by organisms through the synthesis of organic matter using energy derived from ________ and ________
A) hydrothermal, available nutrients
B) chemosynthesis, hydrothermal
C) chemosynthesis, photosynthesis
D) photosynthesis, hydrothermal
E) none of these
C
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Which is not a method that geologists use to study Earth's interior?
A) They infer the interior composition at deep levels from calculations of Earth's density. B) They construct images of the interior using calculations of energy from earthquakes. C) They use ultrasound, X-rays, infrared, and SONAR imaging to get three-dimensional images of rocks at depth. D) They analyze core samples from drilled boreholes.
Describe the temperature changes in the atmosphere with height, and discuss the important characteristics of the four atmospheric layers defined by temperature
What will be an ideal response?
Cultivation of seafood under controlled conditions is called
A) controlled fish production. B) environmentally controlled seafood production. C) aquaculture. D) overfishing. E) seafood culture.
At what time of day is the relative humidity normally at a minimum?
a. when the air temperature is highest b. just before sunrise c. about midnight d. when the air temperature is lowest e. at sunset