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Question

Why are high tides higher than normal days on a new moon or full moon?
  1. The moon is closer to Earth on new moon and full moon
  2. The moon is closer to the sun on new moon and full moon
  3. Very high tides are caused when Earth, Moon and Sun are all aligned in a straight line, which happens on a new moon or full moon
  4. Earth is closer to the sun on new moon and full moon


Solution

The correct option is C Very high tides are caused when Earth, Moon and Sun are all aligned in a straight line, which happens on a new moon or full moon
When the sun and moon are aligned, gravitational forces become exceptionally strong, causing very high and very low tides. These are called spring tides, though they have nothing to do with the season. When the sun and moon are not aligned, the gravitational forces cancel each other out, and the tides are not as high and low.

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