| A | B |
|---|
| Chemical Weathering | Changes: Mineral composion, chemical makeup of rocks. When there is a chem. change minerals can be added to or removed from rocks, or rocks/minerals can be decomposed (decomposition). |
| Mechanical Weathering | When rocks are broken into different shapes and smaller pieces, It also rounds out the sharp points in rocks. |
| Exfoliation | When rocks break due to temperature they often break in circular slabs parellel to the rocks surface. |
| Deflation | When wind carries silt, sand and clay away from the land. |
| Abrasion | The wearing away of rocks by particles carried by wind, water, or other forces. |
| Oasis | Wind erodes the sand to the water depth of soil and enables plants to grow. |
| Wind | Most active in deserts, fields and beaches. Loose material can easily be carried by wind. |
| Running Water | Major cause of erosion. |
| Organic Activity | Plants and animals causing weathering. |
| Oxidation | When oxygen combines with another substance to create a new one. |
| Carbonation | When carbon dioxide dissolves in water a weak acid is produced EX: Pop drink fizz. When it falls it dissolves certain minerals in the ground. |
| Temperature | In hot weather the rock expands, when it cools down it contracts. The continuous process make the surface particles crack or flake off. |
| Sulphuric Acid | Sulphur oxides, byproducts of coal mix with rain to make acid rain. This corodes rock, metals and other material quickly. |
| Plant Acids | Plants produce weak acids that dissolve certain minerals in rocks. EX: Mosses make acids that break rocks into smaller pieces. |
| Erosion | The process of moving weathered rock and soil from one place to another. Over time this creates new landforms. Gravity, wind, running water, waves and glaciers are the 5 agents of erosion. |
| Deposition | The process of rocks and soil being moved and deposited in other places. |
| Loess | Accumulations of fine particles of sand and silt deposited by the wind. |
| Wind Break | A barrier that slows wind down. |
| Runoff | When rain falls it evapourates, sinks and rins over the surface. As it does, it carries particles of sand, clay, and gravel with it. |
| Drainage System | Rills to Gullies to Streams to Rivers. |
| Drainage Basin | The area drained by a main river and its channels. |
| Tributaries | A large stream that flows into the areas main river. |
| Delta | When a river meets a lake or ocean it slows down and spreads out because of deposited sediment. |
| Glaciers | Large massas of moving ice. They're very powerful. They erode by abrasions and plucking away under it. |
| Sea Stacks | A column of resistant rock left standing on beaches. |
