| A | B |
|---|
| Earth’s Surface | is always changing |
| Weathering | process of breaking down rock |
| Chemical weathering | breaks down rock from carbon dioxide in water-example: acid rain causes the breakdown |
| Physical Weathering | breaks down rock by wind, water, ice and temperature and living things like plants or animals. **same rock only smaller |
| Acid Rain | rainwater mixed with carbon dioxide |
| Deposition | builds up the Earth’s surface |
| Erosion | movement of weathered materials-Ex. Rain carries soil down a mountain |
| Glacier | sheet of ice that slides across the Earth’s surface and it wears it away |
| Stone Walls | protect against flooding and stop erosions on the coast |
| Rapid Erosion | two causes are: land slide and avalanche |
| Volcano | cone shaped mountain magma in and lava out- occurs in a weak spot in the crust |
| Fault | a crack or break in the Earth’s crust |
| Earthquakes | damage to houses, buildings, farmland- causes fires |
| Plain | flat grassy area |
| Peninsula | land surrounded by water (a tail or finger). |
| Island | land surrounded by water on all sides |
| Delta | fan shaped area of land where a river flows into the ocean and deposits soil |
| Mt. Saint Helens | volcano-they make more land and form more mountains |
| Older mountains | are smaller because erosion and weathering have worn them down. ( Ex. Landslides, rivers, wind, waterfalls, avalanches) |
