Sea Level, Tides, & Waves

Question 1

changes in sea level is changes to sea ______

Answer 1

volume

Question 2

what two main processes affect sea level/sea volume?

Answer 2

1. how much water is stored in glaciers and ice sheets

2. fact that water molecules expand in warmer temps and contract in cooler

Question 3

Expansion/contraction of ocean water in response to ________ changes

Answer 3

temperature

Question 4

______ temperatures means more meltwater from ______.

Answer 4

higher, glaciers

Question 5

If there is more meltwater from glaciers, then…

Answer 5

the sea level will raise

Question 6

If you have colder global climates, sea level will…

Answer 6

drop

Question 7

why will sea level drop with colder global climates?

Answer 7

because there will be more water frozen into glaciers and ice sheets

Question 8

water molecules expand in _____ temperatures, and contract in _____ temperatures

Answer 8

warmer, cooler

Question 9

current sea levels _____ at an average of ____ mm per year

Answer 9

rise, 2.5

Question 10

which areas are more at risk for sea level rises?

Answer 10

low-level flat coastal areas

Question 11

what are some effects of sea-level rising?

Answer 11

• more erosion during serve storms
• pushed back beaches
• land subsidence.
• causes decreases in fish and shelfish population

Question 12

what is land subsidence?

Answer 12

AS soil becomes saturated, the land will sink, and houses will sink along with it or down into it

Question 13

what are tides?

Answer 13

the rise and fall of sea levels that occur on a daily level

Question 14

Every _____ hours we see two high tides

Answer 14

24

Question 15

Every 24 hours we see ____ high ties

Answer 15

2

Question 16

Every ____ hours we see two low tides

Answer 16

24

Question 17

every 24 hours we see how many low and high tide?

Answer 17

2 of each 2 high, 2 low

Question 18

What are tides caused by?

Answer 18

the gravitational attraction of the moon and the sun

Question 19

AS the Earth rotates on its _____ the moon and the sun are constantly _____ on the waters of the Earth

Answer 19

axis, pulling

Question 20

The Earth is constantly is rotating through…

Answer 20

the gravitational attraction

Question 21

As tides moves in and out of coasts they set up tidal _____

Answer 21

currents

Question 22

As the tide falls and lowers ____ water flows out towards the sea.

Answer 22

more

Question 23

when the tide falls and lowers more water flows out towards the sea. This is called which current?

Answer 23

ebb current

Question 24

rising tide creates the _____ current

Answer 24

flood

Question 25

tidal currents act to remove...

Answer 25

sand piled up by shore processes

Question 26

Tidal currents _____ and ______ sediment that is rich in organic material, such as dead fish carcasses and seaweed

Answer 26

carry, deposit

Question 27

a wave is _____ in the ocean

Answer 27

energy

Question 28

what is a wave caused by?

Answer 28

the energy of the wind

Question 29

shallower water _____ the wave towards its ____

Answer 29

retardas, base

Question 30

what is a rip current?

Answer 30

a localized narrow channel of seaweed-flowing water

Question 31

a localized narrow channel of seaweed-flowing water is called...

Answer 31

a rip current

Question 32

a rip current can...

Answer 32

carry material far out to sea very quickly

Question 33

wave energy is a very efficient method of _____

Answer 33

erosion

Question 34

On ocean shores, the force of the wave energy is _____ enough to break down rock into _____ sized particles

Answer 34

strong, sand

Question 35

lakes do not have strong enough _____ _____ to break down rocks into sand sized particles

Answer 35

wave energy, usually pebble sized

Question 36

waves are efficient at _____ sediment

Answer 36

moving

Question 37

what are the three pathways/methods that waves move sediment?

Answer 37

beach drift longshore current littoral drift

Question 38

what is beach drift?

Answer 38

the movement of particles in and out of the beach

Question 39

the movement of particles in and out of the beach is called...

Answer 39

beach drift

Question 40

beach drift is the movement of _____ in and out of the beach

Answer 40

particles

Question 41

beach drift moves ______ to the shoreline

Answer 41

perpendicular

Question 42

the longshore current carries material ______ to the shoreline

Answer 42

parallel -current moves parallel to the shoreline

Question 43

beach drift and longshore current combine to form...

Answer 43

littoral drift

Question 44

the littoral drift transports sediment at _____ angles down the beach.

Answer 44

oblique