Coasts ch. 10

Question 1

What is the coast

Answer 1

The land of the continent adjacent to the beach

Question 2

Coast description

Answer 2

Land extending inland as far as marine influence is seen

Question 3

Offshore

Answer 3

Extends from breakers to edge of continental shelf

Question 4

Shelf

Answer 4

Continent that is submerged

Question 5

Examples of places that get marine influence

Answer 5

La Jolla, Point Loma

Question 6

Berm

Answer 6

The dry area at the foot of the coastal cliff (not part of the coast, part of the beach)

Question 7

instances when the berm is submerged

Answer 7

Tsunamis, storm surges, high tides (spring tides)

Question 8

wave cut platform

Answer 8

flat eroded bedrock at the beach, eroded by wave energy

Question 9

Notch

Answer 9

Cave cut into sea cliff by wave energy

Question 10

Where do you find offshore extending the farthest out

Answer 10

Passive Margins (longest cont. shelf)

Question 11

Sources of sand on the beach

Answer 11

Erosion of the coastal cliff, rivers, cliff erosion

Question 12

where is there more sediment

Answer 12

continental shelves

Question 13

summertime beach

Answer 13

alot of sand, low energy, low tide, wide berm

Question 14

Sandy beach

Answer 14

Wide Berm

Question 15

Wintertime beach

Answer 15

wave energy is higher, short, high waves

Question 16

Rocky beach…

Answer 16

Narrow berm

Question 17

green algae

Answer 17

water is polluted

Question 18

summertime vs. wintertime beach is b/c of

Answer 18

seasons

Question 19

Longshore current ->

Answer 19

movement of water in surfzone, paralell to the shore

Question 20

why is the longshore current parallel to the shore?

Answer 20

waves approach at an angle (from left to right)

Question 21

drift->

Answer 21

net movement of sand grains

Question 22

CA longshore current

Answer 22

N to S b/c of westerly winds

Question 23

oceanside compartment

Answer 23

transports sediments (sand) from N to S

Question 24

Classification of coasts

Answer 24

Depositional coast -> flat coast

Question 25

why is it flat

Answer 25

because it is not active

Question 26

Depositional coast-passive margin

Answer 26

the transition from land to sea is not associated with a plate boundary

Question 27

Depositional coast-Subsidence

Answer 27

the gradual caving in or sinking of an area of land.

Question 28

Depositional coast-Deposit sediment

Answer 28

the laying down of sediment carried by wind, flowing water, the sea or ice.

Question 29

Depositional coast–Deltas

Answer 29

wetlands that form as rivers empty their water and sediment into another body of water (submergent coasts)

Question 30

Depositional coast–barrier islands

Answer 30

thin ribbons of sand that line the US Atlantic and Gulf coasts and absorb the much of the force of storms like Hurricane Ian as they reach land

Question 31

Erosional coasts

Answer 31

Eroding

Question 32

Erosional coasts–coast is lifted

Answer 32

because it is tectonically active

Question 33

Erosional coasts–active margin

Answer 33

A linear zone where tectonic plates either converge with one another (convergent margins) or shear past one another

Question 34

Erosional coasts–tectonic uplift

Answer 34

the geologic uplift of Earth’s surface that is attributed to plate tectonics.

Question 35

Erosional coasts–cliffs

Answer 35

erosion and weathering. Weathering happens when natural events, like wind or rain, break up pieces of rock.

Question 36

Erosional coasts–Headlands, sea caves, arches, stacks

Answer 36

caused by erosion, when part of the coast separates from

Question 37

Erosional coasts–marine terraces

Answer 37

erosional landforms that develop due to the landward retreat of the active sea cliff in response to erosion by ocean wave energy

Question 38

Marine terrace

Answer 38

any relatively flat surface of marine origin, bounded by a steeper ascending slope on one side and by a steeper descending slope on the opposite side.