Interglacial–glacial period climate cycles are often referred to as appearing saw-toothed, with an abrupt change followed by a more gradual change. When do we see an abrupt change: when going from interglacial to glacial times or when going from glacial to interglacial times? When do we see a gradual change?
What will be an ideal response?
The abrupt change is seen going from glacial to interglacial conditions, while the return to glacial conditions is more gradual.
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In general, which of the statements below best describes what happens in terms of composition as crystallization proceeds down the Bowen's reaction series (shown in the figure)?
A) The early-formed silicates are enriched in iron and magnesium, resulting in such rocks as andesite and granite. As crystallization proceeds, the later-formed silicates are enriched in sodium, potassium, and silicon, resulting in and basalt. B) The early-formed carbonates are enriched in calcium and carbonate, resulting in such rocks as limestone. As crystallization proceeds, the later-formed carbonates are enriched in fossils, resulting in fossiliferous limestone and coquina. C) The early-formed silicates are enriched in iron and magnesium, resulting in such rocks as peridotite and basalt. As crystallization proceeds, the later-formed silicates are enriched in sodium, potassium, and silicon, resulting in andesite and granite. D) The early-formed silicates are enriched in sodium, potassium, and silicon, resulting in such rocks as peridotite and basalt. As crystallization proceeds, the later-formed silicates are enriched in iron and magnesium, resulting in andesite and granite.
Continental polar air masses frequently have surface temperature inversions that contribute to their stability
Indicate whether the statement is true or false
Explain orographic precipitation and predict where in West Virginia will have the highest precipitation due to prevailing winds out of the west that blow across the state
What will be an ideal response?
American bombers flying west for bombing raids on Japan in World War II were slowed down significantly when they encountered a jet stream
Indicate whether the statement is true or false