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science oceans
25 cards·by sammcguire@delmarpin
SONAR stands for:
sound navigation and ranging
GEOSAT measures:
changes in the height of the ocean surface
Using satellites to make maps of the ocean floor is better than using ship-based sonar
because:
satellites cover more territory
How far will future models of the DEEP FLIGHT take scientists?
11,000 m
An advantage of using the JASON II to study the ocean is:
it can go deeper because it is remotely operated
How fast does sound travel in water?
1500 meters per second
How do scientists use sound to figure out the depth of the ocean?
sound bounces off the ocean floor and is timed
The two major regions under the ocean are:
continental margin/deep-ocean basin
If the ocean were a giant swimming pool, the (blank) would be the shallow end
continental margin
What forms feature on the ocean floor?
tectonic plates
The flattest regions on Earth are called:
abyssal plains
Three resources available from the ocean are:
food, salt, kelp
What is one source of food found in the ocean?
fish and other seafood
What are three ways mankind harms the ocean?
fishing, oil spills, dumping waste into the sea
How are tides formed?
the gravitational pull of the Moon/Sun
A stream-like movement of water is a:
current
Three factors that influence currents:
Wind; Earth's rotation; Location of continents
Which way do the winds blow near the equator?
East to West
What happens when a surface current hits a continent?
The current changes direction
Where does the Gulf Stream get its warmth?
From the tropics
The California Current carries cold water south from…
The North Pacific Ocean
Where do Él Niño and La Niña form?
Pacific Ocean
What is Él Niño?
A periodic change of the location of warm and cold water
What is La Niño?
A periodic change in the eastern pacific where the surface water becomes cool
Cold, nutrient-rich water from the deep ocean rises to the surface and replaces warm surface
water in a process called:
Upwelling