Neap tides occur when the Moon is at which phases?

Neap tides occur when the Moon is at which phases?

• A. First Quarter and Third Quarter
• B. New Moon and Full Moon
• C. Full Moon and Last Quarter
• D. First Quarter and Full Moon

Answer: (A)

Neap tides happen when the Sun and Moon pull on Earth’s oceans from about right angles to each other. This occurs when the Moon is at the first quarter or third quarter phase, because then the Moon-Earth line and the Sun-Earth line are roughly perpendicular. The Sun’s tidal effect partially cancels the Moon’s, so the difference between high and low tides is smaller. When the Moon is New or Full, the Sun and Moon line up with Earth and their tidal forces reinforce each other, producing stronger tides known as spring tides. So neap tides specifically occur during the first and third quarter phases.

Neap tides happen when the Sun and Moon pull on Earth’s oceans from about right angles to each other. This occurs when the Moon is at the first quarter or third quarter phase, because then the Moon-Earth line and the Sun-Earth line are roughly perpendicular. The Sun’s tidal effect partially cancels the Moon’s, so the difference between high and low tides is smaller. When the Moon is New or Full, the Sun and Moon line up with Earth and their tidal forces reinforce each other, producing stronger tides known as spring tides. So neap tides specifically occur during the first and third quarter phases.