During a(n) ______ there is about 12 hours of daylight and about 12 hours of darkness anywhere on Earth.

During a(n) ______ there is about 12 hours of daylight and about 12 hours of darkness anywhere on Earth.

• A. Equinox
• B. Solstice
• C. Eclipse
• D. Moonrise

Answer: (A)

This is about an equinox, when day and night are about equal. When Earth’s axis is tilted neither toward nor away from the Sun, the Sun appears to cross the celestial equator. On that day, sunrise is near due east and sunset near due west, and the length of daylight is roughly 12 hours everywhere on Earth. This happens twice a year: around March and September. The other options don’t fit this timing. A solstice is when the Sun reaches its extreme declination, giving the longest or shortest day. An eclipse is just a temporary alignment of Sun, Moon, and Earth and doesn’t determine day length. Moonrise is simply when the Moon becomes visible above the horizon, not related to equal daytime lengths.

This is about an equinox, when day and night are about equal. When Earth’s axis is tilted neither toward nor away from the Sun, the Sun appears to cross the celestial equator. On that day, sunrise is near due east and sunset near due west, and the length of daylight is roughly 12 hours everywhere on Earth. This happens twice a year: around March and September.

The other options don’t fit this timing. A solstice is when the Sun reaches its extreme declination, giving the longest or shortest day. An eclipse is just a temporary alignment of Sun, Moon, and Earth and doesn’t determine day length. Moonrise is simply when the Moon becomes visible above the horizon, not related to equal daytime lengths.