Astroids

1. Asteroids have lots of stone and could make a huge hole in the ground

1.1. Having all of the stone can hit with so much impact that it leaves huge craters and little peices of stone on the ground

2. Asteroids are made of oxygen and silicone and even gold

2.1. These are pressious and/or valuable

3. Some asteroids are huge and can hit really hard

3.1. The force of one can make an explosion that it has as much force as a stick of tnt