Driving Along the Ocean Floor, Part 2

Driving Along the Ocean Floor, Part 2

Driving Along the Ocean Floor, Part 2
Reading Level

	edHelper's suggested reading level:	high interest, readability grades 5 to 7
	Flesch-Kincaid grade level:	4.74

Vocabulary

	challenging words:		circumference, mid-ocean, oceanic, canyons, rift, continental, sediment, material, mantle, extend, past, molten, longer, total, such, crust
	content words:		Pacific Ocean, Challenger Deep, Mariana Trench, Arctic Ocean, Atlantic Ocean, Mid-Atlantic Ridge, Indian Ocean, North America, East Pacific Rise

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Driving Along the Ocean Floor, Part 2
By Patti Hutchison

¹     As you drive past the continental rise on the ocean floor, you come to the ocean basins. These basins lie above the thin oceanic crust. Ocean basins take up about sixty percent of the earth's surface. They contain some very interesting land forms.

²     About five kilometers below sea level you will find wide abyssal plains. These are some of the flattest lands on Earth. They are covered with sediments and rocks. Farther out on the abyssal plains, the bottom is covered with ooze. This sediment is made from tiny organisms that are no longer living.

³     Deep sea trenches are the deepest parts of the ocean basins. They are long, narrow cracks that look like canyons. The deepest spot known on earth is in the Pacific Ocean. It is called Challenger Deep in the Mariana Trench. It is over 11,000 meters deep! The Pacific Ocean has more trenches than the Atlantic. The Pacific's trenches are also deeper than those in the Atlantic.

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