Ocean Floor (Grade 8)
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Ocean Floor
1.
These are formed as plates diverge and magma fills in and builds up in the open spaces.
- abyssal plains
- seamounts
- ocean ridges
- trenches
2.
Which of the following is an undersea, volcanic mountain found on the ocean floor?
- abyssal plain
- seamount
- subduction
- sonar
3.
Which of the following is a large, nearly flat region on the ocean floor?
- abyssal plain
- seamount
- subduction
- sonar
4.
By drilling on the ocean floor, scientists have discovered that the rocks are found near .
- oldest, continents
- youngest, continents
- oldest, mid-ocean ridge
- youngest, mid-ocean ridge
5.
Maps made from readings were some of the first used to show the ocean floor's topography is as varied as the continental surface.
- radar
- ping
- satellite
- sonar
6.
These stretches of ocean floor are likely the flattest surfaces on Earth.
- continental shelf
- mid-ocean ridges
- abyssal plains
- desserts of the Sahara
7.
Which feature of the ocean floor are cut by turbidity currents?
- longshore bars
- submarine canyons
- abyssal plains
- baymouth bars
8.
The process in which the ocean floor plunges into Earth's interior is called .
- construction
- subduction
- rifting
- convection
9.
The movement of the ocean floor on either side of a mid-ocean ridge is best known as
- rifting.
- glaciation.
- ocean-floor spreading.
- subduction.
10.
Describe the topography of the ocean floor.
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