The earth is tide-locked

What would be the practical consequences (on earth) if the moon weren't tide-locked?

What would be the practical consequences (on earth) if the moon weren't tide-locked?

In all honesty, I think the consequences would be pretty minor, except that we would see the dark side of the moon from time to time. The consequences would be greater on the moon.

All that is tide-locked is that the rotation of the moon coincides with the orbit of the moon so that the same side of the moon is always facing the earth. If the moon weren't tide-locked, it would spin from our point of view. The turning of the moon would hardly affect the earth - at least in no way that I can see.

The reason most moons are tide-bound to their planets is that the planets' gravity on their moons is quite large. Strong gravity or strong tidal effects may slow the rotation of orbiting objects, so moons tidal locking is common. Tidal locking of planets - less. Both Pluto and its moon Charon are tidally linked because they are fairly close to one another. Mercury is also tied to our sun in an almost tidal manner.

Well Phuc's answer (um, language please)

Through tidal locking, the moon extended Earth's day by slowing the Earth's rotation from an 18-hour day to a 24-hour day to about 6 hours.

As HDE pointed out, this is not the case. It is the rotation of the earth in front of the lunar orbit that slows the earth down. The moon's tidal effect on the earth plays a role in this, but it is irrelevant that the moon is tide-bound to the earth.

Also, the earth spun much faster than it would on an 18-hour day when the moon was young. According to this article, a day on earth was only a few hours long.

The earth spun 4 billion years ago, unusually fast for an object in our solar system. It might be helpful to consider what is causing planets to spin. When they form, the angular momentum is preserved, but according to the giant impact hypothesis, the earth was hit, not at dead center, but at an angle. The huge impact that formed the moon also made the earth spin very quickly. The moon was also very close when it formed - maybe only twice as high as the Roche Limit, so the moon slowed the rotation of the earth and pulled the (at the time) much larger tidal effects on the moon, causing it to move further moving way.