Friday Starting Line Directions: Log into Blackboard and select the starting line link. Answer the questions on the Google Form. What was the name of the scientist who came up with the theory of sea-floor spreading? What has happened to the poles over time? The youngest rocks can be found where along the sea floor? The oldest rocks can be found where along the sea floor?

Announcements Homework Check: Test next week over Chapters 2, 10, and 11!

Earth and Space Science Unit 4: Plate Tectonics and Mountains Daily Objective: I can describe the theory of plate tectonics and model it in a lab.

Notebook Notes Directions: In your document, write the following information in this order on the LEFT SIDE. (Your Name) Mr. Swisher Earth and Space Science _____ (Period) 11/4/2016

Notebook Notes Directions: In your document, write the following information in this order in the CENTER in BOLD. 10.2 Plate Tectonics

Plate Tectonics Plate Tectonics: Most recent and well-accepted hypothesis that explains how and why the continents on our Earth move. This theory came from parts of the continental drift and sea floor spreading hypotheses. It is also the study of the formation of the features of the Earth.

Tectonic Plates The Earth’s crust and mantle form a layer called the lithosphere. The lithosphere is broken into blocks called tectonic plates. 15 tectonic plates total Made of oceanic crust (thin), continental crust (thick), or both The layer below the lithosphere is called the asthenosphere. It is made of very hot “plastic” rock that can move easily. The Earth’s crust moves when the tectonic plates move on top of the asthenosphere.

Tectonic Plates

Plate Boundaries Plate boundaries are the edges of each plate. Marked by mountain ranges or deep valleys Some follow the lines of the continents There are 3 types of plate boundaries: Divergent Convergent Transform

Divergent Boundaries Divergent Boundaries: Two plates move AWAY from each other “Di” means 2

Divergent Boundaries There are 2 types of divergent boundaries: Oceanic-Oceanic: 2 oceanic plates move away from each other; crust is created Example/Creates: Mid-Ocean Ridge Continental-Continental: 2 continental plates move away from each other; crust is created

Convergent Boundaries Convergent Boundaries: Two plates move TOWARD each other

Convergent Boundaries There are 3 types of convergent boundaries: Oceanic-Oceanic: 2 oceanic plates move toward each other; older plate will sink; crust is destroyed Example/Creates: Island Arcs, Trenches (valleys) Continental-Continental: 2 continental plates move toward each other; neither plate sinks; crusts combine Example/Creates: Mountain Ranges Oceanic-Continental: 1 oceanic plate and 1 continental plate move toward each other; older plate will sink; crust is destroyed Example/Creates: Volcanic Arcs, Trenches (valleys)

Transform Boundaries Transform Boundaries: Two plates SLIDE PAST each other while moving in opposite directions. Example/Creates: Fault Line (where earthquakes happen)

Plate Tectonics Activity

Plate Tectonics Video