Weathering Flashcards

1
Q

what is weathering

A

wearing away of rocks and soil

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2
Q

what does weathering affect

A

shape and composition of rocks and soil

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3
Q

what are agents

A

natural forces that cause an effect or result

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4
Q

what are three types of weathering

A

physical weathering, chemical weathering and biological weathering

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5
Q

whats physicals weathering

A

physical forces such as frost and temperature change

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6
Q

what is chemical weathering

A

chemical changes that weaken rocks

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7
Q

what is biological weathering

A

action of plants and animals

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8
Q

what are two examples of physical weathering?

A

freeze that and exfoliation

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9
Q

what is exfoliation

A

the removal of the outer layer of a rock

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10
Q

when does river erosion happen

A

when river flows over land

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11
Q

explain how a waterfall forms

A
  1. river flows over bands of hard and soft rocks
  2. the river undercuts had rocks leaving an overhang
    3.overhang collapses into plunge pool
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12
Q

what is a meander formed by

A

deposition and erosion

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13
Q

how do meanders form

A

water flows faster on the outside of bend which erodes faster. deposition occurs on inside of bend where river flows slower.

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14
Q
A
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