The steepest natural angle that loose material can stand at without pieces sliding or rolling downslope is called the _______________. (three words)
Fill in the blank(s) with correct word
angle of repose
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Which mineral will "double refract" written text?
A) flourite B) apatite C) quartz D) calcite
The amount of biomass on successive trophic levels in a food chain forms a pyramid in which the biomass on trophic level N+1 is only 20% of the biomass on trophic level N. If pesticide P is transferred from one trophic level to the next with 100% efficiency, what will be the concentration of P on trophic level 5 if the concentration of P on trophic level 2 is 4 parts per million (ppm)?
a. 500 ppm b. 2500 ppm c. 20 ppm d.100 ppm
Muay thai is a sport famous in Thailand. It is a form of
A) a hybrid between soccer and volleyball B) ping-pong C) volleyball D) soccer E) kickboxing
La Niña
A) always lasts for the same period of time as the previous El Niño. B) only affects the Northern Hemisphere. C) can lead to drought in the southern United States. D) has nothing to do with ocean temperatures and circulation.