Tuesday, July 26, 2011
Rays have a spine that stings fish, and some have electricity in their bodies. The stinging spine looks like a sword with teeth. But if the sword was a feather, then the soft parts would be the teeth.
Friday, July 22, 2011
I saw a train carrying coal, and they got it from the mountain. I wanted to know how mountains make coal.
First there's plants that grow. So they die and then they collect in the water. Then dirt and sand buries them. It takes a long time until a mountain gets there. Then it turns into coal.
Coal is very very old. I did not know that coal has ages. It's a billion years old.