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Science > Lesson 3 > Flashcards

Lesson 3 Flashcards

1
Q

Erosion

GIVE AN EXAMPLE :

A

Process when sediment is moved to a new place

GIVE EXAMPLE OF SOIL,ROCK AND SEDIMENT MOVING?

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2
Q

Deposition

A

Process when eroded material is dropped

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3
Q

Floodplain

A

Layers of sediment deposited after a flood

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4
Q

Delta

A

Area where streams deposit their load - around the mouth

near the ocean???river enters ocean???

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5
Q

Alluvial fan

WHY /HOW AND WHERE DO THEY HAPPEN?

A

Fan-shaped deposit that forms on dry land

forms where a stream gets to a flat aarea of land-slows- and puts sediments in that spot

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6
Q

Groundwater

A

Water located within the rocks below earths surface

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7
Q

Shoreline

A

Place where land meets water

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8
Q

Headland

A

Finger shaped projections that form when cliffs of hard rock erode more slowly than surrounding rocks

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9
Q

Sea cave

A

A cave formed when waves repeatedly hits the shoreline

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10
Q

Sea arch

A

An arch where water flows beneath it

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11
Q

Sea stack

A

A toppled sea arch

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12
Q

Wave cut platform

A

A beach surrounded by cliffs

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13
Q

Beach

A

Area of shoreline that is made up of material deposited by waves and currents

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14
Q

Sandbar

A

Exposed or underwater ridge of sand

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15
Q

Barrier island

A

Long narrow island parallel to the beach

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16
Q

HOw do Canyons an valleys form? Such as the Grand Canyon?

A

Rivers carving through mountains year after year

17
Q

Gradient?

A

The steepness of a river

18
Q

load?

A

Amount of sediment in a river

19
Q

Discharge?

A

B

20
Q

what would make more erosion happen?

A

Faster rivers

21
Q

Define and describe the processes of erosion and deposition?

A

Water picks up sediment and sets it down later or deposits it

22
Q

how does gravity, gradient and discharge and load relate to stream erosion and deposition?

A

ddd

23
Q

DESCRIBE WHAT HAPPENS TO SEDIMENT AS A STREAM SLOWS?

A

The heavier sediment begins to get deposited

24
Q

DESCRIBE THE ROLE OF STREAM EROSION AND DEPOSITION IN BUILDING LANDFORMS?

A

They move sediment to create landforms

25
Q

DESCRIBE THE EFFECTS OF EROSION BY GROUND WATER

A

Erosion by ground water can cause sinkholes

26
Q

DESCRIBE HOW EROSION AND DEPOSITION BY WAVES AND CURRENTS SHAPE SHORELINES??

A

They hit the shoreline at different angles causes it to change

27
Q

Explain how water deposits soil, sediment and rock. Give 2 examples

A

When the stream slows down till it doesn’t have the power to move a rock
Delta
Alluvial fan

28
Q

What would you see on the beach if it had been affected by stormy seas and rough waves?

A

You would see less sand

29
Q

Can water move a 5lb rock

A

Yes

30
Q

What can deposition make

A

Landforms

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