eli5: why asteroids with 1km radius are called planet killers?

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They are tiny compared to the earth. I can hardly imagine they even wipe out lives within 1000km radiused area, which still is a tiny compared to the earths surface size. Asteroids are, just giant rocks right? not atomic bombs, wich gives an increasing explosion due to it’s chain reaction. So why?

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Anonymous 0 Comments

The German Leo2 uses “Wuchtgeschosse” against other tanks. These Munition doesn’t contain any explosives. It is made from very hard materials, like Wolfram. Combined with speed, they are able to destroy any tank on the world. Tanks are a lot bigger that one of these Munitions, but still they make the tank not working anymore after a direct hit.

Asteroids also doesent contain explosives, but they have Materie and Speed, a lot of Speed.

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