Which processes would change a metamorphic rock to an igneous rock?
A. Melting and crystallization
B. Weathering, transport, and lithification
C. Increased temperature and pressure
Answer: A
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Which country has the largest proven reserves of coal?
A. Indonesia B. China C. the United States D. Australia E. India
To determine whether a celestial body is approaching or receding from Earth, astronomers employ ________
A) Einstein's equation B) the Stefan-Boltzmann law C) the Doppler principle D) telescopic imaging E) high speed radar
____ ecosystems seem to be particularly sensitive to changes in acidity
a. Freshwater b. Marine c. Forest d. Grassland e. Alpine
Since 1950, aquaculture production has
a. declined by half b. increased almost seven-fold c. increased over 40-fold d. stayed exactly the same as the wild fish catch e. declined by about 10%