List three processes by which felsic and intermediate igneous rocks can be formed from more mafic
magmas. What will be an ideal response?
Possibilities include assimilation, magma mixing, crystal settling, and partial melting.
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Biologists conservatively estimate that the current extinction rate is at least ____________________ times the normal background extinction rate.
Fill in the blank(s) with the appropriate word(s).
Age-sex pyramids are graphical representations of
A) the structure of population at a moment in time. B) the distribution of a population over space. C) birth rates and death rates of a country. D) the rankings of countries around the world. E) a hierarchy of core-periphery relationships. Answer: A
A speeding truck slams on its breaks and skids to a stop. If the truck were heavily loaded so it had twice the total mass, the skidding distance would be
A) half as far. B) one-and-a-half times as far. C) 2 times as far. D) 4 times as far. E) the same.
Explain the effects the historical spread of Islam had in India
What will be an ideal response?