Imagine the tides!
We would probably be tidally locked meaning there wouldn’t be a moving tide.
I could picture the oceans washing over the much of the rest of the planet
Surfing would be awesome
What would it look like? It wouldn't look like anything because all life on Earth would be wiped out if even a planet the size of Mars were in place of our moon.
The gravitational forces would throw our orbit around the Sun so out of whack that we'd be thrown out of that Goldilocks zone very quickly.
And Jupiter? Ha! The radioactivity it spews would make life on the surface impossible.
What if they replaced the moon with say, mars, but increased mars’s distance from earth so that the tidal effects would be nearly the same?
Make the Donald’s hair stand straight up, those tides would.