1.A trench is associated with which plate boundaries. Oceanic-oceanic convergence, hot spot, divergent boundary, oceanic-continental convergence, continental-continental convergence.
My answer is divergent boundary. Is this correct?
2. A rift valley extending thousands of miles is associated with which plate boundaries. Oceanic-oceanic convergence, hot spot, divergent boundary, oceanic-continental convergence, continental-continental convergence.
My answer is a continental continental convergence is this correct?
* Where Is It Found?: Provide a location on the Earth where this type of boundary is located.
* What are some features: Describe several geologic features associated with this type of boundary.
* What are some Connections to Other Disciplines: Give an example of something from Math, Language Arts, or Social Studies that helps describe the meaning of this type of boundary.
1. A trench is actually associated with oceanic-continental convergence and oceanic-oceanic convergence plate boundaries, rather than a divergent boundary. To confirm your answer, let's explore the different plate boundaries:
- Divergent boundary: This is where two tectonic plates are moving away from each other, creating a gap. It often leads to the formation of a mid-ocean ridge, but not a trench.
- Convergent boundary: This is where two plates are moving towards each other. Depending on the types of plates involved, there are three types of convergent boundaries:
- Oceanic-oceanic convergence: When two oceanic plates collide, they form a trench as one plate subducts beneath the other. This process can create deep oceanic trenches, such as the Mariana Trench in the western Pacific.
- Oceanic-continental convergence: When an oceanic plate collides with a continental plate, the denser oceanic plate will subduct beneath the lighter continental plate. This subduction also creates trenches, such as the Peru-Chile Trench along the western coast of South America.
- Continental-continental convergence: When two continental plates collide, neither is dense enough to subduct beneath the other. Instead, the collision forms mountain ranges, but not trenches.
Therefore, the correct answer for the first question is oceanic-continental convergence, not a divergent boundary.
2. A rift valley extending thousands of miles is actually associated with a divergent boundary, not a continental-continental convergence. Let's see why:
- Divergent boundary: As mentioned before, this is where two plates move away from each other, creating a gap. In the case of a divergent boundary on land, it can result in the formation of a rift valley. A rift valley is a long, narrow depression that forms when the Earth's crust is being pulled apart. It can extend for a vast distance, such as the East African Rift Valley.
- Continental-continental convergence: As discussed earlier, when two continental plates collide, they do not form a rift valley. Instead, the collision creates mountain ranges, such as the Himalayas.
Hence, the correct answer for the second question is a divergent boundary, not a continental-continental convergence.
1. A divergent boundry is when two plate move away from each other I think the best answer is Oceanic-Oceanic Convergence
2.I think it is divergent boundries
Since this is not my area of expertise, I searched Google under the key words "'plate boundaries'" to get these possible sources:
http://scign.jpl.nasa.gov/learn/plate4.htm
http://pubs.usgs.gov/gip/dynamic/Vigil.html
http://en.wikipedia.org/wiki/Plate_tectonics
http://www.classzone.com/books/earth_science/terc/content/visualizations/es0804/es0804page01.cfm?chapter_no=visualization
http://www.cotf.edu/ete/modules/msese/earthsysflr/plates1.html
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps a little more. Thanks for asking.