Plate Boundaries By Noah rogers

There are 3 types of plate boundaries. Divergent plate boundaries, Convergent plate boundaries, and Transform plate boundaries.

The 1st plate boundary is Divergent Plate Boundaries. A divergent plate boundary forms where two plates separate. Divergent plate boundaries move away from each other. Think of this kind of like when you play tug of war. Both sides are pulling away from each other๐Ÿ‘ˆ๐Ÿผ๐Ÿ‘‰๐Ÿผ. This is called tension. Tension acts on both ends of a divergent plate boundary and pulls both sides apart. When both sides are spread away from each other at a mid ocean ridge, lava erupts๐Ÿ”ฅ, cools downโ„๏ธ and forms new oceanic crust. Divergent plate boundaries don't just have to be near a mid ocean ridge. They can also exist in the middle of continents. These divergent plate boundaries pull continents apart and form rift valleys. The East African Rift is an example of a continental rift.

This is the San Andreas Fault line.

Your probably asking yourself, why did he tell me that the San Andreas Fault is a transform plate boundary if I don't know what is? Well a Transform plate boundary is when two plates slide past each other. Imagine you holding playdoh. This playdoh is in one piece. You take the upper portion and move it to the right ๐Ÿ‘‰๐Ÿผ and you take the lower portion and move it to the left ๐Ÿ‘ˆ๐Ÿผ. This is shear stress, that acts upon transform plate boundaries. So in a real example of a divergent plate boundary, the plates would be sliding against each other. This isn't always a smooth transition. So sometimes the plates get stuck. When the plates get stuck shear stress will become to great and cause the rocks to break. When this occurs, this causes an earthquake. Different types of landforms that a transform plate boundary include transform faults and fault zones. This is kind of like a strike-slip fault in the middle of 2 plates in the Earth's crust.

This is an example of a subduction zone. A subduction is a part of our final plate boundary, convergent plate boundaries ๐Ÿ˜Ž

Now onto the final plate boundary, the convergent plate boundary. The movement of a convergent is different from the others plate boundaries. The plates come together and collide with each other. ๐Ÿ‘‰๐Ÿผ๐Ÿ‘ˆ๐Ÿผ This type of stress is called compression. When you hear compression you probably think of compressing. And that's totally right. When a machine compresses an object, it pushes it together to kinda smash it. That's what these plates are doing. So when there are two plates that are colliding, the denser plate sinks below the more buoyant plate this is called subduction. When an object is dense (heavier than a buoyant object) it tends to sink in water. And when an object is more buoyant (lighter than a dense object), it ends to stay afloat.

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