Samples of the Earth's molten outer core come directly through the mantle, pour out of volcanoes, and can be studied in labs
Indicate whether the statement is true or false
FALSE
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The planet ______________ has the largest moon in the solar system
Fill in the blank(s) with correct word
If the Earth were to warm up a bit, what would happen?
A) There would be a runaway greenhouse effect, with the Earth becoming ever hotter until the oceans evaporated (as may have happened on Venus). B) Carbonate materials would form in the oceans more rapidly, the atmospheric CO2 content would decrease, and the greenhouse effect would weaken. C) Carbonate materials would form in the oceans more rapidly, the atmospheric CO2 content would decrease, and the greenhouse effect would strengthen. D) Carbonate materials would form in the oceans more slowly, the atmospheric CO2 content would increase, and the greenhouse effect would strengthen. E) The ice caps would melt and cool the Earth back to its normal temperature.
Which of the following is true about irregular galaxies?
A) They were more common when the universe was younger. B) They have significant spheroidal component. C) They are composed solely of old stars. D) They have well defined spiral arms. E) They have reddish colors.
Which of the following statements about stages of nuclear burning (i.e., first-stage hydrogen burning, second-stage helium burning, etc.) in a massive star is not true?
A) Each successive stage of fusion requires higher temperatures than the previous stages. B) As each stage ends, the core shrinks further. C) Each successive stage creates an element with a higher atomic weight. D) Each successive stage lasts for approximately the same amount of time.