DO NOW: HW due tomorrow 10/28
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1 DO NOW: HW due tomorrow 10/28 l What is Pangaea? l What are convection currents? l What is the asthenosphere? How is it related to the lithosphere? l Explain how magma in the mantle causes the plates to move. You must use the following vocabulary words: lithosphere, asthenosphere, convection currents, magma, less dense, more dense, hot, cold, core.
2 Plate Tectonics Convergent Boundaries
3 How are these words and pictures related? Are there any groups that fit together? What do you think our next unit will be about?
4 Review of What We Know The earth s crust is divided into plates, and these plates move (that s why Pangaea broke apart) l What is some evidence for Pangaea? The plates move because of convection currents underneath the Earth (PLAY VIDEO!) tube.com/watch?v=p0dwf_3p Yh4 But other than Pangaea breaking apart, what happens when the plates move?
5 There are Two Types of Plates Oceanic plates l Oceanic plates are thinner and more dense l They are made up of basalt, a dark (black) and very dense rock type composed of silicates, iron and magnesium Continental plates l Continental plates are thicker and less dense l They are made up of granite and andesite, light colored (pink, white and gray) and less density rock types composed almost entirely of silicates. Connect! Think- Pair-Share Based on their densities, what will oceanic plates do and what will continental plates do? How will they move?
6 There are Two Types of Plates l Connect! Think-Pair- Share l Based on their densities, what will oceanic plates do and what will continental plates do? How will they move?
7 When Plates Meet, Big things Happen l Boundary A place where two things meet and interact l A plate boundary is where two plates meet and interact l The plates can be either oceanic or continental, and they can meet and interact in different ways.
8 What will we be learning about? lsee if you can pick out the 3 different types of plate boundaries lbrain POP: Plate tectonics from 1:11 em/platetectonics/
9 What are the different plate boundaries? (hand motions!) l Convergent boundaries l Divergent boundaries l Transform boundaries Today we are learning about CONVERGENT!
10 Plate Boundaries: Convergent l Convergent plates move toward one another l Divergent plates move away from each other l Transform plate moves sideways from each other
11 C.F.U. 1. What is a convergent boundary? 2. How do the plates move in a convergent boundary? 3. What are plates? 4. What are the 2 types of plates? 5. Compare and contrast the 2 types of plates.
12 DO NOW- 10/28/16 1. How do the plates move in a convergent boundary? 2. What are plates? 3. What are the 2 types of plates? 4. Compare and contrast the 2 types of plates.
13 Where do Volcanoes Happen? Inquiry Lab
14 Convergent Boundaries: What else happens l There are two things that can happen when two plates hit each other l1. One sinks under the other and starts to melt l2. They both collide and start to crumble and pile up. l The stress that is occurs when 2 plates collide is called compression
15 Types of Convergent Boundaries l 1. Involves only continental plates l Ex 1: Two continental plates colliding l 2. Involves one or more oceanic plates l Ex 1: Two oceanic plates colliding l Ex 2: An oceanic and a continental plate colliding Remember: The difference between the two type of plates is the density because of the different types of rock that they are made out of
16 Types of Convergent Boundaries *COPY THIS GRAPHIC ORGANIZER INTO YOUR NOTEBOOK* Comparative Density What happens? What forms? Involves ONLY Continental Plates Both have same density They hit each other and squish upwards Mountains Involves ONE OR MORE Oceanic Plates Oceanic is more dense than continental One plate goes under the other (subduction) Volcanoes and Ocean trenches
17 What is going on with Oceanic Plates? l What do we know? l Oceanic plates are MORE DENSE l Things that are more dense SINK l Because oceanic plates are so DENSE, one oceanic plate will always SINK if it is at a convergent boundary! l This is called subduction when one tectonic plate moves under another because it is more dense l Subduction creates volcanoes and ocean trenches DRAW IT OUT!
18 Catalyst HW ON DESK!!! 1. What two things can happed during a convergent boundary? 2. What is subduction? 3. What causes subduction to happen? 4. What landforms does subduction create? 5. Explain how density is involved in creating mountains, volcanoes, and trenches.
19 Ring of FIRE l Is there really a ring of fire??
20
21 Ring of Fire l l Area of Convergent boundaries that surround the Pacific Ocean What type of landform does a convergent boundary create? l Active volcanoes on the convergent boundaries in the Pacific Ocean Looks like a rings of FIRE!!!
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23 Continental-Continental Convergent Boundaries l Plates have the same density so l NO subduction!! l Plates crash into each other l Lithosphere folds like wrinkles and squishes upwards l Mountains are formed
24 C.F.U. 1. What two things can happen during a convergent boundary? 2. What is subduction? 3. What causes subduction to happen? 4. What landforms does subduction create? 5. Explain how density is involved in creating mountains, volcanoes, and trenches.
25 Practice: DRAW IT OUT! Oceanic Continental Convergent boundary Continental-Continental Convergent boundary Continental Plate Continental Plate Continental Plate Oceanic Plate
26 Convergent Boundaries Day 2
27 DO NOW: HW due Tuesday 11/17! 1. What happens at a convergent plate boundary? 2. What is subduction? Why does it happen? 3. What landform does subduction create? 4. What landforms is created when two continental plates come together?
28 Snack Plate Tectonic Lab! What is happening at convergent boundaries??
29 Review
30 Exit Ticket
31 Plate Boundaries
32 Convergent Plates
33 Convergent Plates
34 Convergent Plates
35 Convergent Plates The only subduction zone in the Atlantic
36 Convergent Plates Black arrows show subduction zones and the direction of plate movement
37 Convergent Plates Looking at the depth of earthquakes shows that angle that the plate is being subducted
38 The Big Picture
39 Where are we going? We appear to be headed for another super continent as North America, South America, Asia and Australia converge in the ever shrinking Pacific Ocean
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