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8.2
oceans waves
Question | Answer |
---|---|
In areas where tectonic plates collide, the seafloor has deep_. | trenches |
In areas there tectonic plates separate, the seafloor has mid-ocean _. | ridges |
a feature on the ocean floor | abyssal plains |
type of water in the ocean | sea water |
refers to dissolved salt content | salinity |
sightly salty | brackish |
Oceanographers use _ to explore the sea floor | submersibles |
What is the term of an unman submersible used to explore the sea floor | ROV |
which zone does not receive any sunlight | dark zone |
what happens to density as depth increase in oceans | increase |
Brackish water is polluted water mixed with salt water | False |
Salinity is a measure of the mass of dissolved solids in a mass of water | true |
describe the areas called the abyssal plains | flat plains at the bottom of the sea. |
list two main categories of resources on or beneath the sea floor | minerals, energy |
Distinguish between how an ocean trench and an mid ocean ridge form | trenches are formed when tectonic plates hit and mid ocean ridge is formed when tectonic plates pull apart |
How does light that is absorbed affect the temp. of the water. | It warms up the water |
Why do organisms that perform photosynthesis live only in the surface zone. | They need sunlight to perform photosynthesis. |
the surface zone receives _ sunlight | the most |
The middle zone receives _ sunlight | some |
The deep zone receives _ sunlight | no |
what is thee average temp. of water below a depth of 1000 meters | 4 degrees Celsius |
At what depths is the salinity of ocean water relatively constant | 2000- 4500 |
The salinity of sea water is not constant | true |
The five oceans are the Antarctic oceans, the pacific ocean, the Atlantic ocean, the Indian ocean, and the southern ocean. | false |
water from an sea or ocean has an average salinity of 35ppt | sea watere |