Oceans Water Properties
Oceans Motion
Ocean Tides
Ocean Floor/Exploration
Ocean Resources
100
To astronauts, the Earth looks blue because about 70% of it is covered in _____________.
Water
100
What are the two vertical lines showing in this diagram?
Wave height and amplitude.
100
The difference in water height between high and low tides.
Tidal Range
100
What is the continetal slope?
The steepest part of the continental incline located at the edge of the continental shelf.
100
Name two mineral resources that can be found in the ocean.
Sand, gravel, salt, clay, gold, silver, zinc, copper, etc.
200
The amount of dissolved salt in a given liquid or the ocean.
Salinity
200
True or False: Wavelength is the distance between identical parts on every other wave.
False (back to back waves)
200
What is a neap tide?
A tide that occurs when the sun and moon are at right angles to each other.
200
Where does the transition from continental crust to oceanic crust occur?
The continental rise
200
What are the three categories we made for ocean resources?
Food, Mineral, Energy
300
What factors affect ocean water's density?
Temperature and salinity
300
True or False: Deep ocean currents are less dense than surface ocean currents.
False. Deep ocean currents are more dense than surface ocean currents.
300
What type of tide produces a larger tidal bulge?
Spring tide
300
What are two inventions that advanced the study of oceans.
Submarines, echo sounders, multibeam sonar, satillites, ROVs, etc.
300
What is tidal power?
A renewable energy source from the ocean that channels water through passageways at high tide to generate electricity.
400
How does density affect the ocean water?
Denser water sinks and forces less dense water up, creating currents.
400
What are whitecap waves?
Waves whose crests have been blown off
400
What forces are acting upon the Earth to produce tides?
Gravity from sun & moon, inertia
400
What is the deepest point in our oceans?
The Challenger Deep of the Mariana Trench.
400
What is a natural desalination process?
The water cycle: Evaporation, Condensation, Precipitation. Leaves behind salt.
500
Why do light and heat heat from the sun not travel to the lower parts of the ocean?
They both lose intensity as they pass through water.
500
Why do ocean currents not flow in the exact same direction as the wind that creates them?
Earth's rotation causes currents to curve. The Coriolis effect.
500
A lunar day lasts how much longer than our 24-hour day? What does this change with tides?
50 minutes, it changes when tides occur by 50 minutes.
500
What man sailed multiple voyages in the Pacific Ocean and is responsible for mapping most of it?
James Cook
500
What is desalination?
The process of removing salt from ocean water to obtain freshwater.