Primary production includes everything except
A. minerals
B. fish
C. pharmaceuticals
D. timber
D. timber
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When two oceanic plates converge what determines which crust will submerge?
A) The age of the crust B) The temperature of the crust C) The density of the crust D) All of these choices
Lingering in a long line at the dry cleaners, a woman starts to feel dizzy and tired with a quickly developing headache. Someone suggests that her symptoms might be from breathing something used in the shop
A substance that can cause such symptoms, and is commonly used in dry cleaning, is a A) heavy metal. B) halogenated hydrocarbon, PERC. C) radioactive hydrocarbon. D) safe and gentle natural compound.
Sorting is the process by which sediment grains are selected and separated according to grain size.
Answer the following statement true (T) or false (F)
In what region of the Sun are most of X-rays generated?
A. the inner core B. the chronosphere C. the photosphere D. the corona