Weathering, erosion, and deposition

There are two main kinds of weathering. The first is physical/chemical weathering.

Physical weathering occurs anytime rock is broken down by forces. This is also known as mechanical weathering. 

Chemical weathering occurs when rock is broken down by substances. Examples of this include dissolving by acid rain or oxidation by rusting. 

Physical/Mechanical weathering: 

• Breaks down rock by force 
• Examples could include animal action, plant growth, and abrasion. 

Chemical weathering: 

• Breaks down by use of a chemical, like oxygen 
• Examples could include acid rain or rust 

Both kinds of weathering: 

• Break down rocks 
• Rocks are broken from a bigger piece into smaller pieces

Weathering was the breakdown of rocks. Erosion moves the broken pieces. Erosion is the movement of rock particles. 

Rock particles can be moved (eroded) by wind, water, ice, or gravity. 

Deposition occurs when sediments (broken up pieces of rock) get dropped off (deposited).

Weathering is the breakdown of rock. Erosion is the carrying of rock particles. Deposition is the dropping off of sediment (rock particles)