1. Residence times of chemical elements in the ______ are usually shorter than i
ID: 161254 • Letter: 1
Question
1. Residence times of chemical elements in the ______ are usually shorter than in the _______.
A) atmosphere, biosphere C) biosphere, oceans B) oceans, atmosphere D) atmosphere, oceans
2. Volcanic processes transport gases and aerosols from the _______ to the ________.
A) lithosphere, atmosphere C) lithosphere, hydrosphere B) atmosphere, lithosphere D) hydrosphere, lithosphere
3. The flux that removes excess calcium from the ocean basins is ________. A) evaporation C) subduction
B) sedimentation of calcium carbonate D) reaction with sodium
4. The greatest carbon flux comes from the cycling of atmospheric CO2 through ________.
A) respiration B) precipitation C) photosynthesis D) sedimentation
5. Over the last 150 years CO2 levels in the atmosphere have _______.
A) increased B) remained the same C) decreased D) Scientists have no idea.
6. The lowermost layer of the Earth's atmosphere is called the __________. A) troposphere B) mesosphere C) stratosphere D) thermosphere
7. The most common chemical element in the Earth's atmosphere is ________. A) oxygen B) nitrogen C) sulfur D) carbon dioxide
8. Geochemical cycles trace the flux of chemical elements from one ______ to another.
A) model B) interface C) reservoir D) ocean basin
9. The biosphere is comprised of _______.
A) plants living near the Earth's surface
B) microbes living near the Earth's surface
C) animals living near the Earth's surface
D) all organisms living near the Earth's surface
10. What is the chemical formula for ozone?
A) O B) O2 C) O3 D) O4
11. Which of the following statements regarding ozone is false? A) Chlorofluorocarbons are depleting the ozone layer. B) Ozone absorbs harmful infrared radiation.
C) Ozone forms from oxygen in the stratosphere.
D) Ozone is a greenhouse gas.
Explanation / Answer
1.D) atmosphere, oceans
2.A) lithosphere, atmosphere
7.B) nitrogen
10.C) O3
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