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

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Prepare for the 8th Grade Sun-Earth-Moon System Test. Study with flashcards and multiple choice questions, each question includes hints and detailed explanations. Ensure you’re ready to ace the exam!

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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