chapter 9 section 3 earth
TRANSCRIPT
![Page 1: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/1.jpg)
Chapter 9 Section 3
Shaeed MarshallPer. 1
![Page 2: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/2.jpg)
Key Concept 1.What Is Seafloor Spreading?
-Seafloor Spreading is the process by which plate tectonics produces new oceanic lithosphere.
![Page 3: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/3.jpg)
Key Concept 2.What Is A Subduction Zone?-A Subduction Zone occurs when one oceanic plate is forced down into the mantle beneath a second plate.
![Page 4: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/4.jpg)
Oceanic RidgeA continuous elevated zone on the floor of all major oceans basins and varying at the crests of ridges represent divergent plate boundaries
![Page 5: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/5.jpg)
Rift ValleyA Rift Valley is a deep faulted structure found along the axes of divergent plate boundaries; Rift valleys can develop on the seafloor or on land.
![Page 6: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/6.jpg)
TrenchA Trench is a surface feature in the seafloor produced by the descending plate during subduction.
![Page 7: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/7.jpg)
Continental Volcanic ArcContinental Volcanic Arcs are mountains formed in part by volcanic activity caused by the subduction of oceanic lithosphere beneath a continent.
![Page 8: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/8.jpg)
Volcanic Island ArcA Volcanic Island Arc is a chain of volcanic islands generally located a few hundred kilometers from a trench where subduction of one oceanic slab beneath another is occurring.
![Page 9: Chapter 9 Section 3 Earth](https://reader036.vdocuments.us/reader036/viewer/2022062523/58f086d31a28abb9608b45c1/html5/thumbnails/9.jpg)
The End.
The End