How do globular clusters tell the Sun's spot in the Milky Way?
A: It's actually the positions of the open clusters that provide information.
B: Their velocities can be used to determine their orbits.
C: They are spherically distributed around the center of the Milky Way.
D: Their colors indicate how far away they are from the center.
E: They whisper it to you if you ask really nicely.
Ans: C: They are spherically distributed around the center of the Milky Way.
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Everything looks red through a red filter because
A) the filter emits red light and absorbs other colors. B) the filter absorbs red light and emits other colors. C) the filter transmits red light and absorbs other colors. D) the filter reflects red light and transmits other colors.
Determining your website's target audience's wants, needs, and expectations is generally a one-time process.
Answer the following statement true (T) or false (F)
Which of the following best describes the geological histories of the Moon and Mercury?
A) Impact cratering is the only major geological process that has affected their surfaces. B) All four geological processes were important in their early histories, but only impact cratering still reshapes their surfaces today. C) Impact cratering shaped these worlds early in their histories. Then, during the past few million years, they were reshaped by episodes of volcanism and tectonics. D) Early in their histories, they suffered many impacts and experienced some volcanism and tectonics, but they now have little geological activity at all.
What is produced by the process of electrolysis?
A) energy B) hydrogen and oxygen C) pure drinking water D) photovoltaic power