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8th Grade Science > W,E,D > Flashcards

W,E,D Flashcards

1
Q

What is erosion?

A

Processes that move sediment from one place to another

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2
Q

What is deposition?

A

The laying down of sediment that has been eroded

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3
Q

There’s two types of weathering. What are they?

A

Mechanical and chemical

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4
Q

What is weathering?

A

Processes that break down rock

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5
Q

What 4 things cause erosion?

A

Water, wind, glaciers, and gravity

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6
Q

What are examples of water erosion?

A

Stream erosion, rain drop erosion, wave (beach) erosion

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7
Q

What are the formations of deposition?

A

1- delta and alluvial fans
2- flood plains
3- meanders and oxbow lakes

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8
Q

What are meanders?

A

A bend in a river

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9
Q

What is a oxbow lake?

A

Meander that gets cut off from a river

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10
Q

Is weathering a destructive process or constructive?

A

Destructive

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11
Q

What are examples of weathering?

A

Grand Canyon

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12
Q

What is an example of erosion?

A

A mud slide

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13
Q

What are examples of deposition?

A

Waves dropping sand on the beach

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14
Q

A fanned shape deposits at the end of the mouth of a stream. What is this?

A

A delta

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15
Q

Strips of land on the side of a river made of sediments that are deposited during flooding. What is this?

A

Flood plains

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16
Q

Meander that gets cut off from a river. What is this?

A

Oxbow lake

17
Q

Bend in a river. What is this?

A

Meander

18
Q

What are examples of mechanical weathering?

A
  • growing plants(roots break rock apart)
  • burrowing animals
  • freeze/thaw cycles of water
19
Q

What are examples of chemical weathering?

A
  • oxidation (oxygen combines with water to form rust)
  • acid rain
  • plant acids
20
Q

What is chemical weathering?

A

Chemical reactions dissolve the rocks or change them into different minerals

21
Q

What is mechanical weathering?

A

Rocks are broken apart by physical processes

22
Q

What is wind erosion?

A

Depends on size of sediment and velocity of wind

23
Q

What is glacier erosion?

A

Breaks off pieces of rock as it moves over it- these pieces move with the glacier until they are deposited somewhere else

24
Q

What is gravity erosion?

A

Movement of sediment due to the pull of gravity

8th Grade Science (2 decks)

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