Which metric prefix is commonly abbreviated using a Greek letter?
A) mega
B) micro
C) milli
D) nano
B
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Expensive homes on coastal cliffs are at risk due to
A) erosion from ocean waves. B) erosion from wind. C) erosion from groundwater. D) erosion from streams.
The rocks on the bottom of a pile of sedimentary rocks are ____________________ in age than the
rocks above them. Fill in the blank(s) with the appropriate word(s).
Despite a low net primary productivity (NPP), which ecosystem or life zone produces the most biomass each year?
A. swamps and marshes B. tropical rain forest C. temperate forests D. open ocean E. estuaries
The solar system is surrounded by the Oort cloud composed of about a trillion comets, icy objects with orbits that take them far beyond the outermost planets of our solar system.
Answer the following statement true (T) or false (F)