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Physical Science > Chapter 27 > Flashcards

Chapter 27 Flashcards

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Biology 101 flashcards
1
Q

Do rocks the weather at the same rate?

A

No, they weather at different rates.

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2
Q

What are the 2 main factors that determine how fast a rock will weather?

A

Rock type & landscape.

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3
Q

What are the 2 types of weathering?

A

Mechanical & chemical.

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4
Q

What type of change happens with mechanical weathering?

A

Physical weathering

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5
Q

What type of change happens with chemical weathering?

A

Chemical weathering

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6
Q

What are the 3 specific types of mechanical weathering?

A

Frost wedging, biological activity, & collisions.

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7
Q

What causes frost wedging?

A

Water collects in the cracks of rocks, & freezes.

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8
Q

What is the cycle called during frost wedging?

A

Freeze-Thaw Cycles

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9
Q

What causes biological activity?

A

Plant & animal activity.

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10
Q

What causes weathering during collisions?

A

When rocks fall from a cliff or tumble through turbulent rivers.

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11
Q

What are the 2 types of chemical weathering caused by?

A

Oxygen & water.

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12
Q

What is the chemical process called that is caused by oxygen?

A

Oxidation

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13
Q

What is the chemical process called that is caused by water?

A

Hydrolysis

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14
Q

What is parent material?

A

Material from which soil forms.

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15
Q

What are soil horizons?

A

The different layers of soil.

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16
Q

How many soil horizons are there?

A

There are 6.

17
Q

True or false. All soils contain every soil horizon?

A

False

18
Q

What are specific soil horizons?

A

O, A, E, B, C, & R

19
Q

What does the first soil horizon contain?

A

Organic material

20
Q

What is the second horizon mostly made up of?

A

Minerals

21
Q

Which layer does leaching occur?

A

Horizon E

22
Q

Which horizon collects materials from previous horizons?

A

Horizon B

23
Q

Which layer is partially weathered bedrock?

A
24
Q

Which layer is unweathered bedrock?

A
25
Q

Which soil horizons make up the topsoil?

A
26
Q

Which soil horizons make up the subsoil?

A
27
Q

Which soil horizon make up the true soil?

A

Physical Science (17 decks)

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