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20 Cards in this Set
- Front
- Back
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What is weathering ? |
The breaking down of rocks into smaller particles within its original position (situ) |
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Define denudation |
The wearing of the Earth's surface by the process of weathering , transportation and erosion |
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Name 3 types of weathering |
1 . Physical Weathering 2. Chemical weathering 3. Biological weathering |
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What is physical weathering ? |
The breaking down of rocks into smaller particles without change within its chemical makeup. |
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What is chemical weathering ? |
This is where chemical change takes place within a rock causing it to dissolve or decay . |
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What is biological weathering? |
This is when living organisms disintegrate rocks. |
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Name 2 types of Physical weathering : |
Frost action Pressure release. |
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What is Frost action ? |
The process in which water freezes within cracks of a rocks and expands causing parts of the rock to break off . |
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What is Pressure release ? |
The process in which cracks and joints are formed from the expansion of rocks. |
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There are two types of chemical weathering , what are they?"*†" |
Carbonation and Hydrolysis . |
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Carbonation |
The process in which rocks with calcium carbonate come in contact with weak acid rain causing the rock to become soluable due to a chemical reaction between the two chemicals. |
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Carbonation mostly takes place in what type of rock ? |
Rocks that contain calcium carbonate. |
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Weak carbonic acid + Calcium carbonate = |
Calcium Bicarbonate ( soluable chemical ) |
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How is weak carbonic acid made? |
When rain chemically combines with carbon dioxide. |
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Hydrolysis |
The process by which new substances are formed when minerals in the rock combine with water . |
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In what type of rocks does Hydrolysis must of the time occur in? |
Granite |
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Granite contains what type of minerals |
Feldspar |
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Feldspar + H2O |
Clay minerals ( soluable ) |
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Biological weathering results from ? |
Physical and chemical effects of living organisms |
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Factors of biological weathering |
🌲 roots growing on rocks help to split them up
🐇🐉 Animals such as burrow animals that burrow into the soil and weaken rocks
Acid from decomposed animals😷 contribute to chemical weathering
Secretions left on rocks by snails or algae contribute to chemical weathering . |
