Which lobe of your brain are you using when you answer this question?
What will be an ideal response?
frontal
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Continental growth ____
A)occurs faster at passive margins B)occurs faster along active margins C)occurs mostly by reworked older continental material D)occurs mostly by orogenesis E)is currently nonexistent
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.
The primary difference between renewable resources and nonrenewable resources is ____.
A. how easily each can be discovered B. the available amount of each resource C. the length of time it takes for each to be replenished D. how fast each is being consumed E. how quickly each can produce electricity
Photochemical reactions can lead to the formation of secondary pollutants
Indicate whether the statement is true or false