The elements found on Earth have much to do with
A) white dwarfs.
B) neutron stars.
C) pulsars.
D) quasars.
E) supernovae.
E
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A ________ is a well-tested and widely accepted view that best explains certain scientific observations.
A. theory B. law C. generalization D. hypothesis
Who was the first person to compile a picture of the large-scale wind and current systems?
A) ?Benjamin Franklin B) ?Matthew Maury C) ?Eratosthenes of Cyrene D) ?Wyville Thomson
Insecticides would be most useful in combating
A) mosquitoes that spread malaria. B) weeds that infect our agricultural fields. C) bacteria, such as Salmonella, which sometimes contaminate meat. D) fungi that contribute to molds and mildew that lead to respiratory infections.
El Niño and La Niña events ________
A) both decrease water temperatures in the eastern Pacific Ocean B) occur in precise patterns every 10 years C) produce changes of opposite direction in temperature and precipitation patterns D) both increase water temperatures in the Gulf of Mexico E) both increase water temperatures in the eastern Pacific Ocean