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Flashcards in Thurman Glossary Deck (180)
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1

Abiotic

Pertaining to nonliving factors, not life.

2

Nadir

Point on celestial sphere directly opposite the zenith and directly beneath the observer.

3

Nannplanktoon

Plankton less than 50 microns (0.002 inch) in length that can't be captured in plankton net and must be removed from water by centrifuge or special microfilters.

4

Nansen bottle

Device use by oceanographers to obtain samples of ocean water from beneath the surface.

5

National Flood Insurance Program (NFLP)

prevents costly federal aid after a natural disasters by discouraging building in risk-prone areas.

6

Natural selection

only organisms best adapted to their environment tend to survive and transmit their genes

7

Nauplius

Microscopic free-swimming larva stage of crustaceans. Have three pairs of appendages.

8

Abiotic environment

The nonliving components of an ecosystem

9

Abyssal clay

Deep-ocean deposits containing less than 30% biogenous sediment. Often oxidized and red in color, thus commonly termed red clay.

10

Abyssal hill

A volcanic peak rising less than 1 kilometer (0.6 mile) above the ocean floor.

11

Abyssal hill province

A deep-ocean region, particularly in the Pacific Ocean, where oceanic sedimentation rates are so low that abyssal plains do not form and the ocean floor is covered with abyssal hills.

12

Abyssal plain

A flat depositional surface extending seaward from the continental rise or oceanic trenches.

13

Abyssal storm

Storm like occurrences of rapid current movement affecting the deep-ocean floor. They are believed to be caused by warm and cold core eddies of surface currents.

14

Abyssal zone

The benthic environment between 4,000 and 6,000 meters (13,000 and 20,000 feet).

15

Abyssopelagic

The open-ocean environment below 4,000 meters (13,000 feet) in depth.

16

Acid

A substance that releases hydrogen ions in solution.

17

Acoustic Thermometry of Ocean Climate (ATOC)

The measurement of ocean wide changes in water properties such as temperature by transmitting and receiving low-frequency sound signals.

18

Active margin

A continenal margin maked by a high degree of tectonic activity, such as those typical of the Pacific Rim. Types of active margins include convergent active margins and transform active margins.

19

Neap tide

A tide just after the first or third quarters of the moon phase (occurred every two weeks)

20

Nearshore

Zone of a beach that extends from low tide shoreline seaward to where breakers begin forming.

21

Nebula

Diffuse mass of interstellar dust and/or gas.

22

Nebular Hypothesis

Model that describe formation of solar system by contraction of a nebula.

23

Negative feedback loop

The feedback is negative if the loop gain AB is negative.

24

Nektobenthos

Members of bethos that can actively swim and spend much time off the bottom.

25

Nekton

active swimmers that can determine their position in the ocean by swimming.

26

Calcareous

Containing Calcium Carbonate

27

Calcite

A mineral with the chemical formula CaCO₃

28

Calcite Compensation Depth

The depth at which the amount of calcium produced is equal to the amount of calcium dissolving in the water.

29

Calcium Carbonate

A chalk like substance secreted by organisms in the form of coverings or skeletal structures

30

California Current

The cold eastern boundary current of the North Pacific Subtropical Gyre