Ocean Patterns
Just as there are processes that shape the Earth’s surface on land, many of the same processes shape the ocean floor.
Ocean trenches are narrow and very long sunken areas on the ocean floor. They have steep sides and form the deepest parts of the ocean. Scientists have identified patterns in the location of ocean trenches which help explain their formation. Like mountains and volcanoes, ocean trenches commonly occur at plate boundaries. They are formed when two plates push against each other causing one plate to slide under the other. This interaction at plate boundaries is called subduction.
An abyssal plain is a wide, flat area on the deep ocean floor. They are usually found at depths of over 3,000 meters and account for more than 60 percent of the Earth’s surface.
Like mountains on land, an ocean ridge is a sudden rising of the ocean floor caused by the movement of the Earth’s plates. Many ocean ridges link together forming the mid-ocean ridge. It is the longest series of mountains on Earth, stretching for more than 65,000 kilometers.
Related Printables.
Earth’s Landforms
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_01.small_.jpg)
Comprehension – Earth’s Landforms
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_02.small_.jpg)
Local Land and Water Features
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_03.small_.jpg)
Modeling the Earth’s Features
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_04.small_.jpg)
The Ocean
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_05.small_.jpg)
Earth’s Fresh Water
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_06.small_.jpg)
Using Maps
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_07.small_.jpg)
Map Features
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_08.small_.jpg)
Map Patterns in the United States
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_09.small_.jpg)
Comprehension – Ocean Patterns
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_10.small_.jpg)
Observing Ocean Patterns
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_11.small_.jpg)
Review – Mapping the Earth’s Surface
![](https://ngscience.com/wp-content/uploads/4-NGScience-Mapping-the-Earths-Surface_12.small_.jpg)
Assessment Pack
• printable PDF
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