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Here’s what you need to know, according to Nasa…
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[li]Asteroid: An asteroid is a small rocky body that orbits the Sun. Most are found in the asteroid belt (between Mars and Jupiter) but they can be found anywhere (including in a path that can impact Earth)[/li][li]Meteoroid: When two asteroids hit each other, the small chunks that break off are called meteoroids[/li][li]Meteor: If a meteoroid enters the Earth’s atmosphere, it begins to vapourise and then becomes a meteor. On Earth, it’ll look like a streak of light in the sky, because the rock is burning up[/li][li]Meteorite: If a meteoroid doesn’t vapourise completely and survives the trip through Earth’s atmosphere, it can land on the Earth. At that point, it becomes a meteorite[/li][li]Comet: Like asteroids, a comet orbits the Sun. However rather than being made mostly of rock, a comet contains lots of ice and gas, which can result in amazing tails forming behind them (thanks to the ice and dust vapourising)[/li][/ul]
https://www.thesun.co.uk/tech/9758368/nasa-giant-asteroid-alert-skim-earth/amp
