7th Grade Unit 8: Natural Events that Change the Environment Lesson 2: Effects of Weathering and...
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Transcript of 7th Grade Unit 8: Natural Events that Change the Environment Lesson 2: Effects of Weathering and...
![Page 1: 7th Grade Unit 8: Natural Events that Change the Environment Lesson 2: Effects of Weathering and Erosional Deposition Vocabulary of Instruction:](https://reader036.fdocuments.net/reader036/viewer/2022070413/5697bfc61a28abf838ca71c8/html5/thumbnails/1.jpg)
7th Grade
Unit 8: Natural Events that Change
the Environment
Lesson 2: Effects of Weathering and
Erosional Deposition
Vocabulary of Instruction:
![Page 2: 7th Grade Unit 8: Natural Events that Change the Environment Lesson 2: Effects of Weathering and Erosional Deposition Vocabulary of Instruction:](https://reader036.fdocuments.net/reader036/viewer/2022070413/5697bfc61a28abf838ca71c8/html5/thumbnails/2.jpg)
Video:
Basics of Geology
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1. Abrasion• Refers to the
grinding away of rock by rock particles carried by water, ice, wind, or gravity.
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2. Bioerosion• The process by
which animals, through drilling, grazing, and burrowing, erode hard substances such as rocks and coral reefs.
Crossbedded rippled burrowed sandstone.
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3. Carbonation• Is a form of
chemical weathering where carbonate and bicarbonate ions react with minerals that contain calcium, magnesium, potassium, and sodium.
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4. Chemical Weathering• The process that
breaks down rocks through chemical changes.
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5. Climate• General pattern of weather conditions
for a region over a long period time.
Moist Climate Dry Climate
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6. Deposition• Where the
agents of erosion (water, wind, animals, etc.). lay down sediments.
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7. Exfoliation• The breaking off
of thin concentric shells, sheets, scales, plates, and so on, from a rock mass; measuring less than a centimeter to several meters in thickness, the loosened rock is spalled or fragmented, peeled, or stripped.
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8. Gravitational Erosion• Caused by gravity
and involves both large scale mass wasting and smaller scale erosion. Forms of gravitational erosion include avalanche, landslide, debris flow, mudflow, and sinkhole formation.
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9. Hydrolysis• The chemical
reaction of a compound with water. Hydrolysis is an important component of soil formation, and of chemical weathering.
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10. Ice Wedging• Wedges of
ice in rocks widen and deepen cracks.
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11. Mass Movement
• Any one of several processes that causes a down slope movement of sediment, soil, and rock material.
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12. Mechanical Weathering
• The type of weathering in which rocks is physically broken into smaller pieces.
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13. Oxidation• Is when a substance
reacts with oxygen to form a type of compound known as an oxide that contains at least one oxygen atom.
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14. Thermal Expansion• Characteristic
property of most solids and liquids which causes their volume to increase when they are heated.
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15. Weathering• Physical,
chemical, or biological breakdown of rocks and minerals into smaller sized particles.