Can a meteorite float on water?
No. Meteorites are rocks and metal, so they are heavier than water and sink straight to the bottom.
If you dropped a meteorite into a bath, it would sink, plop, straight to the bottom. Every kind of meteorite known is heavier than water.
Scientists describe how heavy something is for its size using a measurement called density. Water has a density of 1 gram per cubic centimetre. Things less dense than water, like wood, corks and ice, float. Things denser than water sink. The lightest meteorites, a crumbly carbon-rich kind, are still more than one and a half times as dense as water. Most stony meteorites are over three times as dense, and iron meteorites are nearly eight times as dense, which is why they feel so heavy.
There is one kind of Earth rock that can float: pumice. It forms in volcanoes and is full of tiny bubbles of gas, which make it lighter than water. Sometimes people find pumice on a beach and wonder if it came from space. If your rock floats, it is almost certainly not a meteorite.
When meteorites fall into the sea, they sink to the ocean floor. Scientists have even found tiny melted droplets from space, called cosmic spherules, in mud from the deep ocean.