If the rate at which we produce CO2 were to stop rising, the levels of CO2 in the atmosphere would
A. This cannot be reasonably predicted.
B. decrease as CO2 is absorbed by plants, soils, and the oceans.
C. eventually level off.
D. continue to rise.
Answer: D
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Indicate whether the statement is true or false
Which of the following will occur if the temperature of a gas is decreased from 60 K to 30 K at constant pressure?
A) The volume will double. B) The volume will be halved. C) The volume will decrease slightly. D) The volume will increase slightly.
Changes in daylength, the Sun's altitude above the horizon, and the Sun's declination over the course of the year
A) are phenomena that occur only at the equator. B) are factors that follow an irregular, random cycle. C) are responsible for the seasons. D) produce Earth's rotation.
The zone that has no light is called the ________ zone
A) aphotic B) disphotic C) euphotic D) hyperphotic E) hypophotic