Weathering

5. Tree and plant roots dig deep into small cracks and crevices, as they grow they make the cracks larger and eventually the rock or material breaks into pieces.
6. the process by which rocks and earth materials are broken down
7. when animals dig in the soil and scratch at rocks and materials causing them to break into smaller pieces.
8. A type of chemical weathering, carbonation occurs when carbon dioxide in the air combines with water to form carbonic acid.
9. Something that causes weathering, erosion or deposition.
11. This is the tendency for minerals to expand and contract based on temperature. Rapid temperature changes such as day/night cycles (heat from the sun), cause rocks to expand and contract. This type of mechanical weathering will result in the break down of the rock or other material.
12. rocks, sand, or dirt that has been broken down and possibly moved and deposited in a new location.
13. A form of mechanical weathering in which cracks in a rock or other surfaces fill with water, freeze and the water expands causing the cracks to enlarge and eventually break the rock.
14. occurs when a living thing like moss or lichen produce an acid. This acid chemically changes the makeup of the rock causing it to break down.

1. When rocks and Earth materials break down because of chemical reactions.
2. When rocks and earth materials are broken into pieces by physical means
3. When a living organisms breaks down rock and Earth materials
4. A type of chemical weathering that occurs when a rock or Earth materials chemically combines with water changing the chemical makeup of the rock.
9. Rocks and sediment grinding against each other wear away surfaces
10. The reaction of rock minerals or metals with oxygen from the air.