The polar caps and dust storms of Mars can be seen with Earth-based amateur telescopes
Indicate whether the statement is true or false
TRUE
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A newly formed planet or large asteroid becomes molten due to
a. the last infalling objects. b. decay of radioactive element isotopes. c. the last infalling objects and decay of radioactive element isotopes. d. none of the other choices as newly formed planets remain solid inside.
Which of the following general statements about Earth's atmosphere is not true?
A) The nitrogen and oxygen in Earth's atmosphere keep the surface pleasantly warm. B) Atmospheric pressure decreases with altitude. C) Even in low-Earth orbit, some atmospheric gas is still present. D) Atmospheric scattering of light explains why our daytime sky is bright and blue.
Observational evidence tells you that as a nova explosion begins, _____
A) a cloud of debris ejects into space B) matter settles inward onto the surface of a white dwarf and forms a layer of unused nuclear fuel C) dense gas comes toward you at a few thousand kilometers per second D) the spectral lines change to emission lines
During which stage of planetary development did the lunar maria form?
a. cratering b. differentiation c. flooding d. tectonic plate movement e. slow surface evolution