Which term describes the moon phase that looks like a half-circle from Earth?

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Multiple Choice

Which term describes the moon phase that looks like a half-circle from Earth?

Explanation:
Phase changes reflect how much of the Moon's sunlit side we see from Earth as it orbits. A half-circle appearance means exactly half of the Moon is illuminated, which is called a quarter moon. There are two versions: waxing quarter when the illuminated portion is increasing toward a full moon, and waning quarter when it’s decreasing toward a new moon. A gibbous moon is more than half illuminated, so it doesn’t look like a half-circle. A full moon is fully illuminated, and “moon phase” is a general term that doesn’t specify the exact shape.

Phase changes reflect how much of the Moon's sunlit side we see from Earth as it orbits. A half-circle appearance means exactly half of the Moon is illuminated, which is called a quarter moon. There are two versions: waxing quarter when the illuminated portion is increasing toward a full moon, and waning quarter when it’s decreasing toward a new moon. A gibbous moon is more than half illuminated, so it doesn’t look like a half-circle. A full moon is fully illuminated, and “moon phase” is a general term that doesn’t specify the exact shape.

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