Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Name: Date: Pd: __ PLATE TECTONIC WEBQUEST Part A
Document related concepts
Transcript
Name: _____________________________________________ Date: _________________ Pd: __ PLATE TECTONIC WEBQUEST Part A: Convection Current http://volcano.oregonstate.edu/education/vwlessons/lessons/Earths_layers/Earths_layers7.html 1. What are convection currents? 2. In which of Earth’s layers do convection currents happen? _______________________________. 3. When convection currents flow in the mantle, they also move the ____________________________. Part B: Plate Tectonics Go to http://pubs.usgs.gov/gip/dynamic/dynamic.html and Click on the “Historical Perspective” 1. What is a “plate” and “tectonics” in geological terms? 2. What does the Theory of Plate Tectonics state? 3. What is the name of the theory that led to the development of the Theory of Plate Tectonics? 4. Read the process that took place to develop Plate Tectonic Theory. Briefly discuss the ideas that led to our current theory. Click the back arrow of Internet Explorer to return to the homepage of http://pubs.usgs.gov/gip/dynamic/dynamic.html Click on the “Understanding Plate Motions” icon on this website. Click on “Illustration of main types” 5. What are the three types of plate boundaries? a. ________________________ b. _________________________ c. ________________________ Divergent boundaries occur along spreading centers where ___________________ are moving __________________ and new crust is created by _________________ pushing up from the _________________. Read the section on Divergent Boundaries 1. Click on the link: Mid-Atlantic Ridge [26 k]. What is shown in this picture? What type of plate boundary is it? Where is it located? 2. What is the rate at which the Mid-Atlantic Ridge is spreading? How fast will it spread in 100years? 3. What is happening in Iceland that is significant? Describe. Part C: Plate Tectonics: Types of Boundaries: Convergent Boundaries 1. What is the location where sinking of a plate occurs is called? ________________________________ 2. The type of convergence -- called by some a very slow "collision" -- that takes place between plates depends on the kind of lithosphere involved. Convergence can occur between what plate combos? a) ______________________________b) _______________________________ c) _______________________________________ Scroll down to: Oceanic-continental convergence 3. Off the coast of South America along the Peru-Chile trench, the oceanic Nazca Plate is pushing into and being subducted under the continental part of the South American Plate creating what? ________________________________________ 4. Look at the diagram under the Oceanic-continental convergence information: Label diagram. Click on the Ring of Fire [76 k] 5. What is the ring of fire? 6. The Ring of fire results in frequent what? Part D: Plate Tectonics: Types of Boundaries: Convergent Scroll down to: Oceanic-Oceanic convergence 1. When two oceanic plates converge, one is usually subducted under the other what is formed? ____________________ 2. Discuss the greatest trench, where it’s located, what plates form it and how its size compares to largest mountains on land. Scroll down to: Continental-continental convergence 3. What mountain range demonstrates one of the most visible and spectacular consequences of plate tectonics? 4. What happens when two continents meet head-on and neither is subducted? Part E: Plate Tectonics: Types of Boundaries: Transform Boundaries Scroll down to: Transform Boundararies: 1. Define Transform Boundary 2. Where are most transform boundaries formed? 3. Describe the transform boundary found in California. What two plates make up this fault?
