Why are elements heavier than iron less abundant than those that are lighter?
A. This is one of the mysteries of cosmic formation that has yet to be answered.
B. Because they tend to be unstable, and easily undergo fission
C. Because the duration of a supernova is relatively short
D. Spectral evidence suggests they are only rare here on Earth.
Answer: C
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According to actor-network theory, cell phones have agency
Indicate whether this statement is true or false.
A porphyritic igneous texture indicates that
A) there was water in the magma. B) the rock cooled slowly and then quickly. C) the rock broke apart as it flowed. D) the rock cooled slowly. E) the ash and pumice were hot and became compacted.
Divergent plate boundaries are characterized by:
a. hydrothermal alteration and contact metamorphism. b. regional and contact metamorphism. c. regional and dynamic metamorphism. d. dynamic and contact metamorphism. e. hydrothermal alteration and dynamic metamorphism.
Which trend best describes human population growth?
A. Tangential B. Exponential C. Planar D. Linear E. Unpredictable