Where are elements heavier than iron primarily produced?
a. Brown dwarfs
b. White dwarfs
c. Supergiants
d. Supernovae
D
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_____ is the event that occurs when the Moon passes directly between Earth and the Sun, blocking your view of the Sun
A) The summer solstice B) A solar eclipse C) The winter solstice D) A lunar eclipse
Suppose the Moon's orbit were unchanged, but it rotated faster (meaning it did not have synchronous rotation). Which of the following would be true?
A) The Moon would go through its cycle of phases (from one new Moon to the next) in less time than it does now. B) We would no longer always see nearly the same face of the Moon. C) Tides would be stronger; that is, higher high tides and lower low tides. D) High tides would occur more frequently than they do now. E) All of the above are true.
How are the units for the slope of a graph determined?
For a star of Sun-like mass, what is the last stage of the nuclear fusion?
a. Hydrogen to helium. b. Helium to carbon and oxygen. c. Carbon to magnesium. d. Fusion goes all the way up to iron.