Planet Ocean
Ocean Formation
Ocean Floor
Mid-Ocean Ridges
The Deepest Depths
100
The largest habitat on Earth.
What are the oceans?
100
This is where most of the water came from when oceans first formed.
What are volcanic eruptions?
100
The shallow region of ocean that extends from the coast to the continental slope.
What is the continental shelf?
100
This is an underwater mountain range formed as a result of volcanic eruptions at rift zones.
What is an oceanic ridge?
100
This is where trenches form.
What are areas where one tectonic plate slides beneath another (subduction zones)?
200
This ocean has the deepest point on Earth.
What is the Pacific?
200
This type of rock is found in the Earth's mantle.
What is peridotide?
200
The region between the continental shelf and the ocean floor.
What is the continental slope?
200
This is where mid-ocean ridges form.
What are the areas where plates are being pulled apart (rift zones)?
200
The names of the oceans that contain trenches.
What are Pacific, Atlantic, Indian, Southern and Arctic (all of them)?
300
The amount of the Earth's water that is found in oceans.
What is 97%?
300
This type of rock is found in the oceanic crust.
What is basalt?
300
The name for the flat part of the ocean floor covered in mud and ooze.
What is the abyssal plains?
300
These are formed by water seeping into rift zones, becoming superheated and dissolving chemicals, then erupting back through cracks.
What are black smokers?
300
The ocean with the deepest trenches, and the highest amount of trenches.
What is the Pacific?
400
This is when the first life appeared in the oceans.
What is 3.5 billion years ago?
400
Why splits occur in the ocean's crust.
What is the movement of tectonic plates apart from eachother, which is a result of the soft, hot rock of the mantle moving sideways in opposite directions?
400
The underwater mountains that form from underwater volcanic eruptions.
What are seamounts?
400
The type of boundary where mid-oceanic ridges are found.
What are divergent boundaries?
400
The name for the deepest trench and its deepest point.
What is the Mariana Trench and Challenger Deep?
500
This is the volume of water in the oceans.
What is 1.9 billion cubic kilometers (km)?
500
The reason continents rise above oceans.
What is the rocks of the continent being lighter (less dense) than the rocks of the oceanic crust?
500
Where continental slope meets the the abyssal plain.
What is the continental rise?
500
These two scientists created the first complete map of the ocean floor.
Who are Bruce Heezen and Marie Tharp (the Heezen-Tharp map)?
500
The depth of the deepest point of the deepest trench.
What is 35,840 feet below sea level?