20 Questions
Which ocean basin is the largest and deepest in the world?
Pacific
Which ocean basin covers about 20% of the Earth's surface?
Indian
Which ocean basin includes the marine portions of the coastal waters?
Atlantic
Which layer of the Earth is responsible for generating the Earth's magnetic field?
Inner core
Which layer of the Earth is a liquid layer made up of iron and nickel?
Outer core
Which layer of the Earth lies beneath the upper mantle and surrounds the outer core?
Lower mantle
Which layer of the Earth begins just beneath the crust and ends at the top of the lower mantle?
Outer mantle
What is the approximate temperature range of the outer mantle?
500 K to 1,200 K
What is the approximate temperature of the lower mantle?
7,000° F
What is the crust also known as?
Lithosphere
Which layer of the Earth is below the lithosphere and is characterized by relatively low resistance to plastic flow and convection?
Asthenosphere
Where do mid-ocean ridges occur?
Along divergent plate boundaries
What is a seamount?
An underwater mountain with steep sides rising from the seafloor
What is the main source of lithogenous sediments on the ocean floor?
Land via rivers, ice, wind, and other processes
What happens at subduction zones?
A plate with thinner oceanic crust descends beneath a plate with thicker continental crust
What is the function of continental margins?
The outer edge of continental crust abutting oceanic crust under coastal waters
What is the main process that forms mid-ocean ridges?
Seafloor spreading along divergent plate boundaries
What is the depth of a typical mid-ocean ridge?
About 2,600 meters
What type of sediments come from organisms like plankton when their exoskeletons break down?
Biogenous sediments
What is the main process that forms trenches?
Erosion by rivers or by geological movement of tectonic plates
Test your knowledge of the world's main ocean basins - Pacific, Atlantic, Indian, and more! Explore their sizes, depths, and unique characteristics in this informative quiz. Dive into the fascinating world of oceans and discover why they are crucial to the Earth's ecosystem.
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