Like how does it shrink and expand?
In: Physics
It doesn’t actually shrink or expand. Everything in this universe with mass has its own gravitational pull. The more combined mass two objects have, and the closer they are to each other- the greater the gravitational pull between them. The Moon goes around the Earth. When the Moon’s location in relation to the Earth changes, the gravitational pull between the Moon and the giant bodies of water changes. That means that when the Moon is closest to a certain point on Earth, water on that side of the Earth is ‘pulled’ towards the Moon- this results in a high tide. This, in turn, means that on the other side of Earth you have a low tide.
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