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Oceans 109-134 and Unit Material
Oceans 109-134 and Unit material
58
Science
5th Grade
03/26/2011
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Term
Wind patterns and differences in water densities act together to create
 Definition
ocean currents.
Term
Navigation routes, plant and animal life and the mixing of ocean water are all affected by
 Definition
ocean currents.
Term
When ocean depth increases (gets deeper), water pressure
 Definition
increases.
Term
When ocean depth increases (gets deeper), the amount of light
 Definition
decreases. (Remember the deeper you go sunlight is less able to penetrate the waters depth and it gets darker.)
Term
Much of the earth's oxygen is produced by
 Definition
phytoplankton.
Term
The temperature, water pressure and the amount of light at various ocean depths affects
 Definition
the type of plant and animal life found there.
Term
Phytoplankton serves as the
 Definition
base of the ocean ecosystem.
Term
Plankton can survive best in areas where
 Definition
water that is rich in nutrients swells up from the deep.
Term
The everyday activities of people affect
 Definition
the ocean.
Term
What percentage of the earth's surface is covered by oceans?
 Definition
70%
Term
The more gradual slope that is made of sediment that has rolled down the steep continental slope is the
 Definition
continental rise.
Term
The area of the ocean floor that is located just off the coast is the
 Definition
continental shelf.
Term
The steep drop from the continental shelf to the ocean floor is the
 Definition
continental slope.
Term
The deep flat part of the ocean bottom is the
 Definition
abyssal plain.
Term
A break in the ocean floor that creates a deep canyon is
 Definition
an ocean trench.
Term
Ocean trenches are deep and the continental shelf is
 Definition
shallow.
Term
Gases and dissolved salts combine to create
 Definition
ocean water.
Term
The geographic features that are located near the continents are the
 Definition
continental shelf, continental slope and continental rise.
Term
The measure of the amount of salt in the water is the
 Definition
salinity.
Term
The continental shelf, slope and rise are covered with
 Definition
sediments such as sand, mud and rocks.
Term
The salinity of ocean water is higher where there is
 Definition
more evaporation.
Term
The lowest ocean water salinity is found where
 Definition
a river enters the ocean.
Term
The basic motions of ocean water are
 Definition
waves, ocean currents and tides.
Term
A river of water that moves through the ocean is
 Definition
an ocean current.
Term
The rise and fall of the ocean's surface level caused by the moon's gravity is the
 Definition
tide.
Term
A pattern in the ocean caused by vibration is
 Definition
a wave.
Term
On the ocean floor which location is likely to have the greatest water pressure, the coldest temperatures and the smallest number of living organisms?
 Definition
An ocean trench.
Term
What is the deepest part of the ocean?
 Definition
Ocean trenches.
Term
Scientists have explored many parts of the ocean.  As submarines descend (go deeper), scientists observe that there is an increase in the
 Definition
water pressure.
Term
The largest of Earth's four main oceans is the
 Definition
Pacific.
Term
The shallow underwater edge of Earth's land masses is called the
 Definition
continental shelf.
Term
Water pressure is the weight of water pressing down on something.  Water pressure
 Definition
increases with depth.
Term
Rift
 Definition
A valley that runs along the top of a mid-ocean ridge.
Term
An underwater volcano that rises above sea level is
 Definition
an island.
Term
A hydrometer is used to measure the
 Definition
density of a liquid.
Term
The water cycle is the ongoing movement of water between Earth's land, air, and bodies of water.  What is the source of energy for the water cycle?
 Definition
The sun.
Term
Prevailing winds and the movement of the Earth cause
 Definition
Surface currents.
Term
Nekton and plankton would probably be studied by a
 Definition
Marine biologist.
Term
Desalination is a process for
 Definition
removing salt from salt water.
Term
The distance from the crest of one wave to the crest of the next is
 Definition
wavelength.
Term
Most ocean waves are caused by
 Definition
wind blowing across the water surface.
Term
Tides are caused mainly by
 Definition
the Moon's gravitational pull on Earth.
Term
Salinity
 Definition
The measure of how salty water is.
Term
Mid-ocean ridge
 Definition
Underwater mountain range where sea-floor spreading occurs.
Term
Plankton
 Definition
Tiny marine plants and animals that drift on the ocean.
Term
Density
 Definition
Amount of matter in a given volume of a substance.
Term
Trough
 Definition
Low part of a wave.
Term
Current
 Definition
River of water that flows through the ocean.
Term
Trench
 Definition
Deep, narrow valley in the ocean floor.
Term
Crest
 Definition
High point of a wave.
Term
Abyssal plain
 Definition
Large, flat area on the ocean floor.
Term
Tide
 Definition
Regular, alternating rise and fall of the ocean's surface level.
Term
Continental Rise
 Definition
Gentle rise at the base of the steeper continental slope.
Term
Continental shelf
 Definition
Gently sloping underwater edge of a continent.
Term
Continental slope
 Definition
Ocean floor from the edge of the continental shelf to the continental rise.
Term
Mid-ocean ridge
 Definition
Underwater mountain range where sea-floor spreading happens.
Term
Sea-floor spreading
 Definition
Formation of new ocean floor where plates move apart.
Term
You are standing on the shoreline at the edge of a continent.  If you walked out into the ocean, list the order of the first four geographical ocean parts you would encounter.
 Definition
The continental shelf, the continental slope, the continental rise and then the abyssal plain.
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