8th The Sun-Earth-Moon System (C20) Practice Test

When the visible portion of the Moon is getting larger, the Moon is which phase?

Third Quarter New Moon Waxing Waning

Correct Answer:

Waxing

Explanation:

Growing illumination is waxing. When more of the Moon’s sunlit side becomes visible night after night, you’re in the waxing phases, moving from New Moon toward Full Moon through waxing crescent, first quarter, and waxing gibbous. After the Full Moon the illuminated portion starts to shrink—that’s waning—and New Moon is when it’s not visible at all. Third Quarter is part of the waning period, while New Moon is invisible. So, if the visible portion is getting larger, the Moon is waxing.

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