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Hi! My name is Timmy. I am a rock. I started out on top of a mountain. I was born with a condition, you see, the rock doctors call it being permeable. This means, I have tiny air pockets in my rock body which allows water or other substances to slip through. One night, water slipped through the tiny air pockets located inside my body due to my condition. Then the water froze and expanded. it split me in half and I rolled down the mountain losing chunks of my body as I fell. The outside layer of my shell was really jagged now and I was significantly smaller.
A couple days later, it hailed. Giant hail the size of a golf ball. In rock school, I learned that hail is a type of mechanical weathering. The hail broke off the jagged edges of my outer layer.
I fell into the river the other day. I was swept up by the current. The rough and jagged edges that were once there are gone. I am also a lot smaller. This is the process of erosion. I learned about it in rock school. I am being broken down by natural forces such as water.
In rock school I also learned, after erosion comes deposition. I was deposed of on a new river bank. Soon after my deposition. I sank into the sand. All the particles of sand rubbed against me and started to break me down. In school i learned this was the process of abrasion.