Week 4 - Center of the Earth

if i knew nothing about science, i would probably think that the center of the earth was a rock. it would make sense because when you dig into the ground there is dirt and gravel. so it would seem like the farther you dig, there would still be rocks. and it would seem like the earth would have to be formed around something, and a rock is really firm and durable, so it would hold together and the earth wouldn't fall apart. but you wouldn't really think of the earth being liquid in the middle because it would seem lilke the earth would fall apart. so if you didn't know, it would make sense for the middle of the earth to be a big rock.