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Physical Science > chapter 27.1 > Flashcards

chapter 27.1 Flashcards

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Biology 101 flashcards
1
Q

the process that involves chemical or physical breakdown of the earth’s crust

A

weathering

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2
Q

a mixture of weathered rock, organic matter, water, and air that is capable of supporting plant life

A

soil

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3
Q

what is weathering

A

the breakdown of materials on earth’s surface

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4
Q

do rocks weather at the same rate

A

No, depends on location/rock type

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5
Q

what are the two main factors that determine how fast a rock will weather

A

rock type/landscape

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6
Q

what are the two types of weathering

A

chemical and mechanical

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7
Q

what type of change happens with mechanical weathering

A

frost, biological activity, collisions

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8
Q

what causes frost wedging

A

frost wedging between cracks

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9
Q

what is the cycle called during frost wedging

A

freeze thaw cycles

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10
Q

what causes biological activity

A

plant/animals activity

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11
Q

what is parent material

A

materials that make up the soil

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12
Q

what are soil horizons

A

the different layers of soil

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13
Q

how many soil horizons are there

A

6

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14
Q

True or False

all soils contain every soil horizon

A

false

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15
Q

what are specific soil horizons

A

o,a,e,b,c,r,

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16
Q

what does the first soil horizon contain

A

organic material

17
Q

what is the second horizon mostly made up of

A

minerals

18
Q

which layer does leaching occur

A

Layer E

19
Q

which horizon collects materials from previous horizons

A

Horizon B

20
Q

which layer partially weathered bedrock

A

Horizon C

21
Q

which layer is weathered bedrock

A

Horizon R

22
Q

which soil horizons make up the topsoil

A

Horizons O,A

23
Q

which soil horizons make up the subsoil

A

Horizons E,B

24
Q

what causes weathering through weathering

A

when rocks fall from a cliff or tumble through turbulent rivers

25
Q

what is chemical weathering

A

oxygen/water

26
Q

what is chemical weathering

A

oxygen/water

27
Q

which horizons make up the truesoil

A

Horizons O,A,B,E

Physical Science (14 decks)

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