A porphyritic texture where large crystals are embedded in a matrix of small crystal may form when ________
A) climate change causes crystals to cool at different rates
B) crystals of different compositions cool at different rates
C) a magma that has partially crystallized slowly moves to a different location where it then cools rapidly.
D) crystals of different compositions grow to different sizes
C
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In the 110-V circuit shown,
A) 110 C of charge flow through the lamp every second. B) 110 J of energy are converted to heat and light in the circuit every second. C) 110 J of energy are given to each coulomb of charge making up the current in the circuit. D) 110 J of energy are shared among all the coulombs in the circuit at any instant. E) none of the above.
This is the first type of cloud an observer will see when a warm front is approaching
A) low-level stratus. B) nimbostratus. C) altostratus. D) cirrus.
Why do ecologists favor the term food web as opposed to food chain?
What will be an ideal response?
Air pollution problems seldom occur when winds are weak or calm
Indicate whether the statement is true or false