| A | B |
|---|
| weathering | the process of breaking down rocks and other substances at the Earth's surface. |
| erosion | the remvoal and movement of earth materials by natural agents. |
| uniformitarianism | the idea that the same processes that shape the Earth today shaped the Earth in the past. |
| Two types of weathering | mechanical & chemcial |
| Is mechanical weathering a physical or chemical change? | physical change |
| Is chemical weathering a physical or chemical change? | chemical change |
| physical change | the change in appearance of the object |
| chemical change | the change in the chemical composition of the object to produce a new material with new physical properties. |
| Mechanical weathering | breaks rocks into smaller pieces. Is a very slow process |
| Types of mechanical weathering | freezing, thawing, release of pressure, plant growth, actions of animals, and abrasion |
| Chemical weathering | breaks rocks through a chemical change |
| Causes of chemical weathering | action of water, oxygen, carbon dioxide, living organisms, and acid rain |
| Natural agents of erosion | glaciers, wind, water, earthquakes, volcanoes, tornadoes, hurricances, mud flows, and avalanches |
| How are weathering and erosion related? | They work together to continuosly wear down and carry away the rocks at Earth's surface. They are non-stop, never ending processes. |
| What does weathering and erosion lead to? | New soil |
