Flashcards in Week 1 Deck (63)
study of life in the sea- hypersaline environment
how organisms are grouped based on shared/similar characteristics
key to identifying characteristics
order of taxonomy
domain, kingdom, phylum, class, order, family, genus, species
lower in the taxonomy-
a group of interbreeding organism, reproductively isolated form others, that have potential to produce unique offspring
area where one crustal plate slides on top of the other. they always occur at the deepest part of the ocean.
trenches can be caused by
collision of two oceanic plates
near shore or shelf zone
there will be a continental rise (sediments accumulate over time) like long dead organisms. deeper you go the older you get. after the rise, things level out at abyssal plain. its not all smooth. there are rocks and canyons.
all of ur major oceanic bases (pacific, atlantic, indian, arctic, antarctic ocean) are
interconnected around antarctica. water moves from antarctic north.
why is water is the way it is
1. small molecule. more reactive.
2. polar. can stick to other molecules
3. Covalent bond bw O and H. takes a lot of energy to separate.
high boiling point: 100 deg C
high freezing point: 0 deg C
CO2- boils at -80deg C. they are almost the same size, but diff properties.
large bodies of h20 moderate the climate of nearby land masses because
large bodies of water become heat sink, water becomes “resistant to change”
more ectotherms than homeotherms.
most important parts of salinity
sodium and chloride
-clarity or turbidity
-sechi disk used to assess primary productivity which is conducted by photoautotrophs (phytoplankton) converting inorganic carbon (CO2) to sugar (C6H12O6) and O2
02 minimum layer
bc net oxygen level is 0. Oxygen minimum layer in subtropical regions due to higher respiration
-primary productivity is approximately equal to respiration.
Coriolis effect (force)
objects in motion are deflect due to earth's rotation. bc of coriolis effect, surface currents move at a 45 angle from wind direction.
which oceanic base is larger?
driving warm nutrient off shore. displaces water around and below it. cold water.
why is ocean blue?
0 primary productivity at 1000 m. light penetrance dependent on plankton biomass.
blending coloration. seen in heteropods (transparent)
transfer of wind energy to water. The energy moves through the water, but the water does not move.
-wave of unexplained origin
-maybe the result of wave amplification
-not ‘tidal wave’
—> major undersea perturbation
—volcanic eruption earthquake “land slide”
Earth, sun, and moon align
2 times a month
we get higher high tides and lower low tides