Sea Level, Tides, & Waves Flashcards Preview

Earth Science > Sea Level, Tides, & Waves > Flashcards

Flashcards in Sea Level, Tides, & Waves Deck (44)
Loading flashcards...
1

changes in sea level is changes to sea ______

volume

2

what two main processes affect sea level/sea volume?

1. how much water is stored in glaciers and ice sheets
2. fact that water molecules expand in warmer temps and contract in cooler

3

Expansion/contraction of ocean water in response to ________ changes

temperature

4

______ temperatures means more meltwater from ______.

higher, glaciers

5

If there is more meltwater from glaciers, then...

the sea level will raise

6

If you have colder global climates, sea level will...

drop

7

why will sea level drop with colder global climates?

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

8

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

warmer, cooler

9

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

rise, 2.5

10

which areas are more at risk for sea level rises?

low-level flat coastal areas

11

what are some effects of sea-level rising?

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

12

what is land subsidence?

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

13

what are tides?

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

14

Every _____ hours we see two high tides

24

15

Every 24 hours we see ____ high ties

2

16

Every ____ hours we see two low tides

24

17

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

2 of each 2 high, 2 low

18

What are tides caused by?

the gravitational attraction of the moon and the sun

19

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

axis, pulling

20

The Earth is constantly is rotating through...

the gravitational attraction

21

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

currents

22

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

more

23

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

ebb current

24

rising tide creates the _____ current

flood

25

tidal currents act to remove...

sand piled up by shore processes

26

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

carry, deposit

27

a wave is _____ in the ocean

energy

28

what is a wave caused by?

the energy of the wind

29

shallower water _____ the wave towards its ____

retardas, base

30

what is a rip current?

a localized narrow channel of seaweed-flowing water