What evidence supports the hypothesis that Earth's early atmosphere (before 2.3 billion years ago) did not contain oxygen?
What will be an ideal response?
The Precambrian iron-ores of the U.S. Great Lakes Region, South America, and Australia indicate the lack of oxygen during early Earth history. These iron ores are peculiar chemical sedimentary rocks that cannot form from water that contains oxygen (as the modern oceans do).
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Which of the following statements is true about the transfer of energy, matter, or momentum in the atmosphere?
A. Momentum is usually transferred from the surface upward. B. Energy transfer occurs when water changes state between solid, liquid, or gas. C. No transfer of energy, matter, or momentum can occur in the polar part of the atmosphere. D. Matter is transferred so effectively that the spatial distribution of matter in the atmosphere is uniform.
The ozone "hole"
A) occurs the equatorial regions as a result of higher stratospheric temperatures. B) is a natural phenomenon resulting from the unequal distribution stratospheric oxygen. C) is a complex phenomenon in polar regions that results in the release of seasonally large amounts of chlorine, which breaks down ozone. D) usually forms over industrial areas during summer when large amounts of SOX and NOX are released into the atmosphere.
It is assumed that no matter how poor a school is, the longer the pupils attend, the more likely they are to learn something
Indicate whether the statement is true or false.
The amount of water in pore spaces has no effect on mass movements of earth materials.
Answer the following statement true (T) or false (F)