List these three magmas in order from the most silica-rich to the least silica-rich composition: basaltic magma, rhyolitic magma, andesitic magma
What will be an ideal response?
Most silica rich is felsic (rhyolitic), then intermediate (andesitic), then least silica rich is mafic (basaltic).
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Using the order of crystallization on the Bowen's reaction Series, rate the resistance of silicate minerals to chemical weathering. In other words, which mineral(s) weather first and why? And last?
What will be an ideal response?
A cluster rarely contains more than 10 galaxies.
Answer the following statement true (T) or false (F)
From climate records it is clear that ________
A) a runaway greenhouse effect threatens to kill life on Earth B) the scientific notion of global warming seems to be in error C) Earth's temperatures have actually decreased substantially in the last 100 years D) humans created the greenhouse effect E) there has been warming in the last 100 years
Marketable permits work best when there are _____________________ permit holders who are highly interested in trading.
A. several dozen or a several hundred B. less than a hundred C. more than a thousand D. a few dozen or a few hundred