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Answer:
1. First-quarter moon.
2. New moon.
3. Full moon.
4. 13 degrees.
5. 29 1/2 days.
Explanation:
A moon can be defined as the natural satellite of planet earth that shines as a result of the sun's reflected light, as it revolves around the earth from west to east in 29½ days.
1. First-quarter moon: a visible half-circle.
2. New moon: darkest phase of the moon.
3. Full moon: when the the Earth is between the sun and the moon.
4. 13 degrees: this is a measurement of how far the moon advances each day in orbit.
5. 29 1/2 days: the time the Earth must rotate to return to same position relative to the moon.