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Goal:Homework:Warm-up: DR 4.3 “Plate Tectonics” due tomorrow Locate different types of plate boundaries on the sea floor map. In your science journal 

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Presentation on theme: "Goal:Homework:Warm-up: DR 4.3 “Plate Tectonics” due tomorrow Locate different types of plate boundaries on the sea floor map. In your science journal "— Presentation transcript:

1 Goal:Homework:Warm-up: DR 4.3 “Plate Tectonics” due tomorrow Locate different types of plate boundaries on the sea floor map. In your science journal  Look at the diagram on p. 108 – 109. What happens when a continental plate and oceanic plate collide? What is this process called, and why does it happen?

2 Animation

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4 Transform Boundary Divergent Boundary Convergent Boundary (oceanic/continental) (oceanic/oceanic) (continental/continental) On the back of your map:

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8 Goal:Homework:Warm-up: none Draw diagrams for each of the types of plate boundaries. In your science journal  After watching BrainPop, list and describe each of the three types of plate boundaries. Tell what features you’d expect to find at each type.

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10 Divergent Convergent Transform

11 Animation

12 Lithosphere is broken up into many plates Lithosphere is broken up into many plates Interaction between the plates causes continents to move and oceans to expand Interaction between the plates causes continents to move and oceans to expand Earthquakes, volcanoes, and other plate movement all caused by heat trying to escape from the Earth’s interior. Earthquakes, volcanoes, and other plate movement all caused by heat trying to escape from the Earth’s interior. So why is it called the “Theory” of Plate Tectonics?

13 Plates moving apart Plates moving apart Seafloor spreading Seafloor spreading Mid-ocean ridge Mid-ocean ridge Volcanic activity Volcanic activity Mid-Atlantic Ridge

14 Magma in the ________________ starts to push through and form a new ______. asthenosphere rift

15 ___________boundary on a continent ___________boundary on a continent New _______ forming New _______ forming Label the Great Rift Valley on your seafloor map. Click here to see what’s happening at this rift valley. here Divergent ocean

16 Goal:Homework:Warm-up: none To draw diagrams of each type of plate boundary. In your science journal  Look at this diagram of a convergent boundary between two oceanic plates. What causes the trench to form, and what causes the island arc to form?

17 Plates move laterally past each other Plates move laterally past each other Many earthquakes Many earthquakes All these “strike-slip” faults surrounding the ridge are called the “fracture zone”.

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19 Label the San Andreas Fault on your seafloor map. Also, label the large transform boundary that cuts across the East Pacific Rise.

20 Plate are pushed together Plate are pushed together Depends on which types of plates are converging Depends on which types of plates are converging

21 Oceanic goes under continental due to greater density Oceanic goes under continental due to greater density Trench is created off the coast Trench is created off the coast Mountains created on land due to rising magma Mountains created on land due to rising magma magma

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23 The OLDER oceanic plate will sink beneath the other The OLDER oceanic plate will sink beneath the other Trench is created in between the plates Trench is created in between the plates An island arc is created due to rising magma An island arc is created due to rising magma magma

24 Aleutian Islands, Alaska Japan The Philippines

25 Both plates collide and deform Both plates collide and deform The crust thickens as mountains are pushed upward The crust thickens as mountains are pushed upward Regional metamorphism takes place Regional metamorphism takes place

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28 Animation

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30 Convection and Tectonics Animation

31 Hottest magma  Cooler magma  These motions cause _____________ These motions cause _____________ circulation RISES SINKS CLICK ME!

32 Animation

33 Transform Boundary Divergent Boundary Convergent Boundary (oceanic/continental) (oceanic/oceanic) (continental/continental) On the back of your map:

34 Goal:Homework:Warm-up: Study for plate tectonics quiz tomorrow To complete and label the features on a profile of the seafloor. In your science journal  Without looking at your book, notes, or map, draw and label a diagram showing a convergent boundary between continental and oceanic plates. You have 60 seconds starting…

35 Goal:Homework:Warm-up: Study for plate tectonics quiz tomorrow To complete and label the features on a profile of the seafloor. In your science journal  Without looking at your book, notes, or map, draw and label a diagram showing a convergent boundary between continental and oceanic plates. You have 60 seconds starting… NOW!

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37 How many different plates are there in this diagram? 1 234

38 Label the features below:

39 1.Identify the plate boundaries by placing a big letter “D” above the divergent boundary and placing a “C” above each convergent boundary. 2.What process is taking place along the ridge? What process is taking place at the trenches? 3.During subduction, a(n) ___________ plate will sink beneath the continental plate. 4.What causes one plate to sink while another floats? sea floor spreading subduction oceanic Oceanic crust is denser than continental because it’s more mafic in composition.

40 5.Using a green colored pencil, shade in the area where the youngest ocean rocks would be found. Then, in blue, shade in the area of oldest ocean rock. Which of these areas (green or blue) would have the thickest sediment sitting on top of it, AND why? 6.Using a red colored pencil, color in 2 areas where you would find melting rock. What happens to the melted rock, and what landforms does it produce? Blue would have the thickest layers of sediment because it’s older and has had more time to accumulate debris. The melted rock (magma) rises to the surface because it’s hot (less dense) where it creates volcanoes.

41 7.On your diagram, draw circular arrows like those in Figure 1 on p. 110 to show the circulation of the magma within the Earth. What is the name of this process? 8.Plate tectonic motion is causing the ___________ Ocean to expand, while the __________ Ocean is getting smaller. convection Atlantic Pacific

42 Online Quiz: Online Quiz: Article Summary: Article Summary: PowerPoint Presentation: PowerPoint Presentation: Quiz window: Thurs. 10/29 through Mon. 11/2 at 11:59 pm. Quiz window: Thurs. 10/29 through Mon. 11/2 at 11:59 pm. Everyone takes both quizzes. Everyone takes both quizzes. See my website for the links. See my website for the links.website Due Wed. 11/4 (day after ½ day) Due Wed. 11/4 (day after ½ day) Choose ONE article of the two for the Geology Unit. Choose ONE article of the two for the Geology Unit. Everyone EXCEPT presenters Everyone EXCEPT presenters Wed. 11/4 Wed. 11/4 Look at rubric for requirements Look at rubric for requirements Only our two presenting groups (see me after class) Only our two presenting groups (see me after class)


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