Nonsense. The moon would just burn up in the atmoshere

but what kind of cheese?? they have different melting points, you know

Umm. No. The meteor that wiped out the dinosaurs was only about 6 miles wide. The moon is 2,159 miles wide. Its gravity is enough that it causes the tides of Earth's oceans, and has many other effects. Life on Earth evolved with the moon there, and possibly because the moon was there. Without the moon, there would be a lot of changes (Earth's tilt would fade, and along with it the seasons we now experience and rely on, along with a number of other affects, which could be bad), although it's possible life would adapt. If the moon were to hit the Earth, however, it has enough mass that the two bodies would shatter. Not only would it kill all life on Earth, but prevent any chance of any form of life continuing. Why? Because there wouldn't be an Earth anymore.

I suspect you're trolling with your OP, though (hopefully). If not, it's a sad indictment of our education system.
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Never believe. Always question. Rebuke belief, a.k.a. bias, a.k.a. groupthink, a.k.a. ideology, the bane of skeptical, logical reason.