Phases of the moon

What primarily causes the Moon's phases as observed from Earth?

• The Earth's rotation on its axis.

• The Moon's rotation on its axis.

• The Moon's orbital position around Earth relative to the Sun.

• The Earth's position relative to the Sun.

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What is the term for the line that divides the illuminated day side of the Moon from its unlit night side?

• The Equator

• The Meridian

• The Terminator

• The Horizon

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Approximately how long does it take for the Moon to complete one full cycle of its phases?

• About 7 days

• About 14 days

• About 29.5 days

• About 365 days

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What is the appearance of the Moon from Earth during a New Moon phase?

• Fully illuminated, appearing as a bright circle.

• Half-illuminated, showing a distinct straight line between light and dark.

• A thin crescent, with horns pointing away from the Sun.

• Mostly dark and unilluminated, as the Moon is between the Earth and the Sun.

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Why is the 'First Quarter' moon phase given its name?

• It is the first quarter of the moon's visible surface.

• It has completed one-quarter of its orbit around Earth.

• It is the first quarter of the lunar month.

• It appears as a quarter of a circle in the sky.

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What is the relative position of the Earth, Moon, and Sun during a Full Moon?

• The Moon is between the Earth and the Sun.

• The Sun is between the Earth and the Moon.

• The Earth is between the Moon and the Sun.

• The Earth, Moon, and Sun form a right angle.

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When does the Third Quarter moon typically rise and set?

• Rises at sunset and sets at sunrise.

• Rises at noon and sets at midnight.

• Rises at midnight and sets at noon.

• Rises in the late afternoon and is up most of the night.

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What causes the phenomenon known as 'Earthshine' on the Moon?

• Direct sunlight hitting the unlit side of the Moon.

• Light from distant stars illuminating the Moon's surface.

• Sunlight reflected off the Earth illuminating the unlit side of the Moon.

• The Moon's own internal light source.

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