Which phase is the Moon shown as a half-illuminated disk with the left side lit?

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Study for the 8th The Sun-Earth-Moon System Test. Explore our interactive tools like flashcards and multiple-choice questions with detailed explanations to prepare effectively. Ace your exam confidently!

Multiple Choice

Which phase is the Moon shown as a half-illuminated disk with the left side lit?

Explanation:
Half of the Moon’s disk being illuminated indicates a quarter Moon. The side that glows shows whether it’s waxing or waning: the right half lit means waxing toward the first quarter, while the left half lit means waning toward the New Moon. So when the left side is illuminated, you’re observing the last quarter (also called the third quarter) phase. New Moon would be nearly invisible, and a Full Moon would have the entire disk lit.

Half of the Moon’s disk being illuminated indicates a quarter Moon. The side that glows shows whether it’s waxing or waning: the right half lit means waxing toward the first quarter, while the left half lit means waning toward the New Moon. So when the left side is illuminated, you’re observing the last quarter (also called the third quarter) phase. New Moon would be nearly invisible, and a Full Moon would have the entire disk lit.

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