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- 1. Multiple Choice
Where does salt in the oceans come from?
Near-shore salt deposits
River inflow
mid-ocean ridges
deep-sea hydrothermal vents
- 2. Multiple Choice
The surface of the Earth is covered by ___ % salt water.
49
65
71
82
- 3. Multiple Choice
Where is the Challenger Deep, the deepest portion of the Earth's ocean, located?
Atlantic Ocean
Pacific Ocean
Arctic Ocean
Indian Ocean
- 4. Multiple Choice
The two most common ions in seawater are...
Magnesium
Calcium
Sodium
Chloride
- 5. Drop Down
The yearly weather at a site on the coast is most likely more (a) than a site that is inland 100 miles.
moderateextreme - 6. Multiple Choice
The Coriolis Effect is caused by...
the Sun's Gravity
Gyres
The Moon's Gravity
the Earth's Rotation.
- 7. Multiple Choice
What has the strongest influence on the tides?
The Moon's Gravity
The Earth's Rotation
The Sun's Gravity
Wind
- 8. Drop Down
The highest high tides and lowest low tides occur during (a) when the Sun, Moon and Earth (b)
Spring Tidesform a straight line.Neap Tidesform a 90 degree angle. - 9. Multiple Choice
The time between high tides is...
6 hours and 12.5 minutes
12 hours and 25 minutes
24 hours and 50 minutes
- 10. Multiple Choice
Large scale surface currents are create by...
the rotation of the Earth
global wind patterns
the shape of the ocean basins
local wind patterns
- 11. Multiple Choice
Thermohaline Circulation is caused by...
density differences
temperature differences
salinity differences
- 12. Multiple Choice
Which of the following takes place in polar regions?
Surface water becomes cold and saline, and it then undergoes downwelling.
Warm currents like the Gulf Stream keep ice from forming.
Surface water becomes so dense it undergoes upwelling.
Warm water rises from deep in the ocean, keeping the poles warmer than they would otherwise be.
- 13. Multiple Choice
A map of the seafloor (or the bottom of any body of water) is called a...
Contour map
Mercator map
Bathymetric Map
topographic map
- 14. Multiple Choice
Resources obtained from the ocean are...
mostly at the surface
both living and non-living
scarce
virtually impossible to obtain
- 15. Multiple Choice
What type of currents are potentially dangerous to swimmers, because they rapidly carry water offshore quickly?
Surface Currents
Longshore Currents
Deep Currents
Rip Currents
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