What is the most common way in which sinkholes form?
A. the roof of a cave collapses
B. a rising dome of salt finally reaches the surface
C. a small explosion of methane gas from coal beds
D. a small explosion of CO2 gas from dissolving limestone
Answer: A
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Isotopes of the same element have:a
different numbers of protons but the same number of neutrons. b. the same number of electrons and different numbers of neutrons. c. different numbers of neutrons but the same number of protons. d. different numbers of electrons but the same number of neutrons. e. none of the above
Sorting describes
A. the layering in the sediment. B. the general shape of the clasts in the sediment. C. the size range of clasts in sediment.
A subsistence farmer might ________
A) buy commodities from others B) barter or trade goods they grow C) accumulate a surplus of goods to sell for financial gain D) allow production and consumption of goods and services to take place in a market system E) sell goods they catch and grow
What European power forced the opium trade on China and profited from Chinese opium addiction?
A) France B) Germany C) Japan D) Great Britain E) Russia