Transcript Salt water

1-1
This works by calculating the time it
takes for sound waves to travel to the
ocean floor and reflect back; we use it
to measure the depth of the ocean.
1-1
SONAR
1-2
On average, there are this many grams
of salt per 1,000 grams of seawater.
1-2
35 ppt
1-3
This is the depth at which the
water temperature drops rapidly.
1-3
Thermocline
1-4
This is at least one factor that
would cause salinity to increase.
1-4
Freezing
or
Evaporation
1-5
Between pure and salt water (pick one
of these as your answer), this type is
more stable because it has a lower
freezing point and higher boiling point.
1-5
Salt water
2-1
There are three main classes of
ocean floor sediments and these
are two of the three.
2-1
Terrigenous – comes from rocks and
minerals of the continental crust
Biogenous – comes from living sources
such as shells and skeletons from tiny marine animals
Hydrogenous – forms when chemical
reactions cause minerals to crystalize from seawater
2-2
When the oceanic plate is sliding
beneath (subducting under) the
continental plate there is this type
of continental margin.
2-2
Active continental
margin
2-3
These are triggered by
earthquakes or gravity and are
large undersea landslides of mud.
They can carve out and create
submarine canyons.
2-3
Turbidity Currents
2-4
These form at divergent plate
boundaries where magma rises
between the plates and cools,
forming new sea floor.
2-4
Mid-ocean ridges
2-5
This is a ring shaped coral reef that
develops around a volcanic island.
2-5
Coral atoll
3-1
Surface currents are ultimately
caused by this.
3-1
Wind
3-2
This current causes the British
Isles and Iceland to have warmer
climates than they normally have.
3-2
Gulf Stream
3-3
Occurs along the western coast of
continents and equator and it is
when cold deep water comes to
the surface.
3-3
Upwelling
3-4
The global circulation of ocean
currents that transports heat,
nutrients, and gases is often
modeled as this.
3-4
Global Conveyor Belt
3-5
This drives deep ocean currents.
They are important to marine
animals living in the deep ocean as
the retain the oxygen absorbed at
the surface as well as the
temperature and salinity.
3-5
Density Currents
4-1
The periodic rise and fall of the ocean
surface due to the gravitational pulls
of the moon and sun.
4-1
Tides
4-2
These tides occur twice a
month when high tides are
especially high and low tides
are especially low.
4-2
Spring tides
4-3
Amount of time it takes the
daily tides to cycle.
4-3
24 hours and 50
minutes
4-4
The difference in water level
between high tide and low tide.
4-4
Tidal range
4-5
This refers to when the Earth,
moon, and sun are at right angle
to one another and high tides
and low tides are moderate.
4-5
Neap tides
5-1
The measure of dissolved salts
in water.
5-1
Salinity
5-2
A cone-shaped undersea
mountain of volcanic origin that
rises high above the ocean floor.
5-2
Seamount
5-3
A flat-topped seamount.
5-3
Guyot
5-4
A large flat area on ocean floor,
composed of sediments that
originated mostly on continents.
5-4
Abyssal Plain
5-5
A partially enclosed body of
water along the coast where
freshwater (from
rivers/streams) meets and
mixes with salt water from the
ocean.
5-5
Estuary
Why are diatom
(phytoplankton) shells found in
ocean-floor sediments?
They settle to the ocean
floor after the diatoms die.