True or False. Do some cities dump their sewage water that they are not able to use into the ocean?
True. Many cities dump their left over sewage water into oceans
100
How are ocean basins shaped?
Ocean basins are shaped by shifting sediments, from waves. The sediments get moved around every time a wave comes, so the ocean basins are ever changing.
100
What is mid-ocean ridge?
A place on the ocean floor where magma erupts as two plates pull apart
100
What causes ocean currents?
The moon, as it goes around the earth it will pull on the tides with gravity.
100
Where was the last tsunami to date?
Japan
200
True or False. Does waste from factories, refineries and mines sometimes end up in the ocean?
True. If it is not directly dumped into the ocean it then can travel through rivers and streams and end up in the ocean.
200
What are 3 common formations in ocean basins?
Ocean Ridges (mountains), abyssal plains, and trenches
200
What is a subduction Zone?
A boundary where two plates collide causing one to sink below the other
200
What type of currents are created when large quantities of sediments sliding from continental slopes to the ocean floor below?
Turbidity currents
200
What causes hurricanes?
Heated water and dropped air pressure
300
Can life be found in areas that sewage sludge has been dumped in?
No. No life can be found where sewage sludge has been dumped.
300
How are ocean ridges formed?
Ocean ridges are formed when two plates shift and one goes up, and some magma escapes from the earth’s interior, creating a lithospheric plate. These plates are part of the ocean floors.
300
What the two different movements a plate can do?
Subduction or Spreading
300
What is a ocean current?
Ocean currents are basically waves
300
How high can a tsunami get?
Tsunami's can get up to 100 ft (30 m) high
400
What is the farthest distance away that animals have been found dead of a sewage sludge dumping area?
a. 15790 miles away.
b. 1000 miles away
c. 200 miles away
b. 1000 miles away
400
What is an abyssal plain, and how are they formed?
An abyssal plain is a long flat area of the ocean floor. They are covered with layers of sediment. They are made by many sediments from continents that have accumulated over the years.
400
How does volcanic dust become sediment in the deep-ocean basins?
Dust is blown out to sea by wind, dust lands in water and settle to the bottom of the ocean
400
Are ocean currents on the surface of the water, below, or both?
Both
400
Which way do hurricanes spin if there on the south side of the equator?
Clockwise
500
How much oil ends up in the ocean each year?
Five million tons of oil every year ends up in the ocean
500
How deep is the deepest point of Marianas trench?
About 36 000 ft below sea level
500
What is continental drift and why does it happen?
It is the movements of Earth’s plates. It happens because of the magma’s temperature below the Earth’s surface
500
How many types of ocean currents are there and what are they called?
2, surface currents (surface circulation) and deep water currents (thermohaline circulation)
500
Where was the biggest tsunami on earth and how big was it?
Lituya bay, Alaska on July 9, 1958. It was 1720 feet tall.