Ocean Life Zones and Waves Flashcards Preview

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Flashcards in Ocean Life Zones and Waves Deck (42):
1

Plankton

small organisms that float in fresh/marine water

2

Nekton

swim in open water,independent of currents

3

Benthos

live at bottom of ocean/sea

4

Benthic Envirnonment

Near bottom of ocean floor

5

Pelagic Environment

zone near surface/middle, beyond sublitoral, above abyssal zone

6

Intertidal location

between low tide and high tide limits
twice a day, zone changes with flowing tides

7

Sublittoral location

begins @ low tide limit
extends to edge of continental shelf

8

Bathyal location

edge of continental shelf to abyssal plain
depth- 200m-4000m below sea level

9

Abyssal location

on the abyssal plain

10

Hadal location

floor of ocean trenches

11

Intertidal charateristics

exposed to ocean water and air+sun
organisms must survive water and exposed land

12

Sublittoral charasteristics

temp., water pressure, and sunlight fairly constant
more stable than intertidal zone

13

Bathyal characteristics

lack of sunlight
plant life is scarce

14

Abyssal characteristics

no plants and very few animals
largest ecological zone of the ocean
4000m depth

15

Hadal characteristics

deepest zone (6000-7000m in depth)
little known about it

16

Intertidal organisms

clams, oysters, barnacles, crabs, seaweed, starfish, anenomes

17

Sublittoral organisms

corals, plants, some fish

18

Bathyal organsims

sponges, brachiopods, sea stars, echinoids, octopuses

19

Abyssal organisms

crabs, sponges, worms, sea cucumbers

20

Hadal organisms

type of sponge, few species of worms, type of clam

21

Neritic location

covers continental shelf
shallow

22

Oceanic location

covers entire sea floor except continental shelf

23

Neritic characteristics

warm and shallow
largest concentration of marine life
receives more sunlight

24

Oceanic characteristics

deep- temperature cold and pressure high
organisms spread out

25

Neritic organisms

fish. plankton, other marine animals

26

Oceanic organisms

giant squids, some whale species

27

Wave height

the vertical distance between the crest and the trough

28

Wavelength

the distance between two crests or two troughs

29

Wave period

the time it takes for one wavelength to pass a given point

30

Waves are caused by...

wind and the shape of the ocean floor

31

_______ transfers ________ from air to water molecules through_______

wind transfers energy from air to water molecules through friction

32

Waves of water only move....

up and down, not horizontally

33

Particles in the wave move in a ________ motion

circular motion

34

What is a breaker?

where the bottom of the wave hits the ocean floor and the top keeps moving, forming an arc
(wavelength shortens and height increases as bottom of wave interacts with ocean floor)

35

Waves start at an _______ with the wind, and ____________ to become ________ with the shore when breaking

waves start at an angle with the wind, and slow down to become parallel with the shore when breaking

36

Longshore Current

waves strike shore at an angle, causing a current to flow parallel to the shore

37

How do rip tides form?

when a sandbar is broken apart, causing water to rush back to sea

38

What is a tsunami

Waves that form when a large volume of ocean water is suddenly moved up or down- usually generated by an earthquake

39

What causes tides

The pull of gravity between the earth sun and moon

40

Does the sun or moon have a greater influences on the oceans

Moon because it's closer

41

Spring tide

Occurs twice a month at full and new moon

Highest high tide and lowest low tide

42

Neap tide

Occurs twice a month at first and last quarter

Causes low high tide and high low tide