Plate Tectonics Guided Notes

Date ______-N Plate Tectonics – Guided Notes

Plate Tectonics:

1. According to the theory of ______, Earth’s crust and part of the upper mantle, known as the ______, are broken into sections.

2. These sections, called______, move on a plasticlike layer of the mantle, known as the ______.

Plate Boundaries:

1. Plates can ______, or ______or ______or slide alongside one another.

3 Types of Plate Boundaries:

A. Plates Moving Apart –

1. ______: The boundary between two plates that are moving apart.

2. ______: a. New sea floor being made, b. Underwater Volcanic mtns

Other features found at the Mid-Ocean Ridge: • • •

3. Another type of Divergent boundary is the: ______. - Features found at a Rift Valley • ______• ______created by a ______force

B. Plates Moving Together

1. ______: occurs where two plates move together. (collide causing a collision area – like a head on crash of two cars)

2. Where Two Continental Plates Collide They form:  ______(material being scraped up and pushed together)  ______

3. When an ______plate converges with a less dense ______plate, the denser oceanic plate sinks under the continental plate.

4. ______: The area where an oceanic plate subducts, or goes down, into the mantle. Features found at a subduction zone….. • ______• ______• ______• ______5. ______type of convergent boundary created where one plate bends and sinks beneath the other. • Old Sea Floor being destroyed

6. The newly formed magma is forced upward along these plate boundaries, forming ______.

Where Plates Collide

1. A subduction zone also can form where two ______plates converge.

• In this case, the colder, older, ______oceanic plate bends and sinks down into the mantle.

C. Where Plates Slide Past Each Other

1. ______: Occur where two plates slide past one another. • They move in opposite directions or in the same direction at different rates.

Features: ______The ______is part of a transform plate boundary. It has been the site of many earthquakes.

Causes of Plate Tectonics

______: The cycle of heating, rising, cooling, and sinking. • This process occurs in the ______, it is thought to be the force behind plate tectonics.