An electron de-excites from the fourth quantum level to the third and then directly to the first. Two frequencies of light are emitted
How do their combined energies compare to the energy of the single frequency that would be emitted by de-excitation from the fourth level directly to the first level? Answer: The combined energies of the two frequencies emitted by the one electrons is A) greater than the energy of the single frequency.
B) less than the energy of the single frequency.
C) equal to the energy of the single frequency.
D) not predictable because other factors, such as the temperature of the surroundings must also be considered.
C
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A slope is ________ if its strength exceed denudation processes and ________ if its materials are weaker than denudation processes
A) stable; unstable B) in disequilibrium; in equilibrium C) unstable; stable D) in equilibrium; in disequilibrium
The crust makes up approximately what percentage of Earth's entire mass?
a. 1% b. 10% c. 25% d. 50%
The process that breaks down rock at the Earth's surface through disintegration of rocks into mineral particles or dissolving it into water is known as
A) landmass denudation. B) weathering. C) erosion. D) deposition. E) mass movement.
If clay minerals in a sedimentary rock were buried at a depth where subsurface temperatures exceeded 200°C, which common metamorphic mineral would they become?
A) Quartz B) Muscovite C) Amphibole D) Plagioclase