system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:When the tide on rivers goes out/down, where does it go?

Looking at the River Thames right now and its the lowest I think I've ever seen it, so got me wondering where the water goes and where does it come from when the tide is high?
gpt
The other side of the earth.  It's like the oceans are in a giant bowl sloshing around due to the pull of the moon and other planets. 

However, that's actually too simplistic. Because the impact of this gravity creates waves of energy, which are, yes, waves, and ever 12.41 hours leads to a high tide and a low tide. So the high tide wave travels around the seas, impacted by the geography and spinning of the earth, creating the tides. So less "other side of the earth" than "to another part of the nearby ocean, and the movement is powered by the moon and sun."