difference between need tide and spring tide
Answers
Tides are movement of Earth’s oceans due to the gravitational tug of the moon and the sun. The Moon's closeness to the Earth results in about twice as much pull force and thus the more important tidal influence. The relative positions and combined gravitational impacts of the two heavenly bodies help determine the timing of the most and least pronounced tides: the spring and neap tides, respectively.
When the moon is in its full and new phases the earth, sun and moon are all aligned, which means the sun’s and moon’s gravitational forces coincide. A more pronounced tidal range – stronger high and low tides – results from this alignment. These spring tides get their name not because of the season but because they “spring” stronger up and down.
Neap tides results from the moon and sun working against each other's pull. When the moon is in its first and third quarter phases, the earth, sun and moon form a right angle. Acting in counter directions, the gravitational tugging of moon and sun weaken one another, resulting in less pronounced high and low tides than normal: a neap tide.