| Question | Answer |
| Frost Action | The force of freezing water splits rocks apart. |
| Abrasion | Wearing away of rocks by wind or water. |
| Gravity | As rocks fall, they collide with each other and break apart. |
| Organic Activity | When roots grow or animals dig holes, rocks split apart. |
| Acid Precipitation | Rain, sleet, or snow that contains a high concentration of acid. |
| Exfoliation | The peeling of rounded thin layers from the rock's surface. |
| Hydrolysis | The chemical reaction of water with other substances. |
| Plant Acids | Acids formed by the decay of plants and animals that eat away rocks. |
| Oxidation | The chemical reaction of oxygen with other substances. (Rust is an example) |
| Carbonation | Carbonic acids dissolves rocks and caves form underground. |
| Sulfuric Acid | Pollution from factories dissolves in rainwater and eats away at rocks and buildings. |
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Created by:
tricia72
on 2009-10-19