Now I have another question. If satellite orbits decay when the satellite slows down, does that mean the moon's orbital velocity is accelerating in order for the orbit size to increase? What's causing the acceleration? I could look it up but I'm too lazy.
The moon, through its gravity, distorts the shape of the Earth's oceans, causing the tides, and the bulges of the tides in turn exert drag on the moon through the same gravitational attraction. But, because the Earth is spinning in the same sense as the moon orbits, only faster, the effect of this drag is to speed up the orbital speed of the moon, and decrease the rate of spin of the Earth. (Angular momentum, which like energy is a conserved quantity, is thereby transferred from the Earth to the moon.) As a result, the moon's orbit gradually widens, while the rotation of the Earth slows down a bit.