Types of Plate Boundaries
The earth’s crust A. Is one continuous layer of rock with no breaks B. Can be classified into two types (continental & oceanic) C. Is split into smaller pieces called plates D. Both B and C
The earth’s crust A. Is one continuous rock B. Can be classified into two types (continental & oceanic) C. Is split into smaller pieces called plates D. Both B and C
The Earth’s plates A. Move quickly around the surface of the earth B. Sometimes run into each other C. Never move D. Never touch
The Earth’s plates A. Move quickly around the surface of the earth B. Sometimes run into each other C. Never move D. Never touch
Why do plates move? A. Magma circulating in the mantle moves them around B. Explosions from undersea volcanoes propel the plates apart C. The plates repel and attract each other because they are magnetic
Why do plates move? A. Magma circulating in the mantle moves them around B. Explosions from undersea volcanoes propel the plates apart C. The plates repel and attract each other because they are magnetic
Mantle Convection Differences in temperature cause material to circulate Coolmaterialdescends.mov Convectionboilingsoup.mov
Plates are Pushed & Pulled Seafloorcarriedaway.mov
Draw this plate boundary Divergentboundary.mov
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What happens at a divergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
What happens at a divergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
Divergent Plate Boundary Starts on land as a rift valley Ends up as a mid-ocean ridge (after millions of years)
Divergent Boundary Formation Riftvalley.mov
Divergent Boundary Formation Seafillsrift.mov
Divergent Boundary Formation Divergingplates.mov
Divergent Boundaries Locations: Mid-Atlantic Ridge (Middle of Atlantic Ocean) East African Rift Zone
What type of plate boundary is this? Convergentplatemargins.mov
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What happens at a convergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
What happens at a convergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
How many types of convergent boundaries are there?
How many types of convergent boundaries are there?
Converging Oceanic/Continental An oceanic plate and a continental plate meet The denser oceanic plate sinks underneath the continental plate Called subduction Produces volcanoes on the continental plate
Draw this Oceanic/ Continental Convergent Boundary Convergentplatemargins.mov
Converging Oceanic/Continental Locations Washington and Oregon (Cascade Mountains) Andes Mountains (South America)
Converging Oceanic/Oceanic Two oceanic plates meet The oceanic plate with older crust is colder so it is A. Less Dense B. Denser C. Thicker D. Hotter
Converging Oceanic/Oceanic Two oceanic plates meet The oceanic plate with older crust is colder so it is A. Less Dense B. Denser C. Thicker D. hotter
Converging Oceanic/Oceanic It subducts underneath the less dense plate Volcanoes form on the upper plate
Converging Oceanic/Oceanic Locations: Japan The Philippines
Converging Continent/Continent Two continental plates with the same density meet True or False: Subduction can occur? FALSE! Volcanoes can form? Mountains form? TRUE!
Converging Continent/Continent Himalayamountains.mov
Converging Continent/Continent Locations: Himalayas (between India and China)
India Collides with Asia Indiahitsasia.mov
Draw this plate boundary Transformboundary.mov
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary
What happens at a TRANSFORM boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
What happens at a TRANSFORM boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing
Transform Boundary Locations: California (San Andreas Fault)
Hot Spots Occur in the middle of plates (not a plate boundary) Very hot area of mantle (Mantle plume) melts through the crust Stationary (never move) As plate moves, mantle plume will melt several holes in the crust, forming a chain of volcanoes
Hot Spots Which of these chains of volcanoes is caused by a hot spot? A. Japan B. Hawaii C. The Andes in South America D. The Cascades in North America
Hot Spots Which of these chains of volcanoes is caused by a hot spot? A. Japan B. Hawaii C. The Andes in South America D. The Cascades in North America The rest are convergent boundaries
Hot Spots Hawaiianislandbuilding.mov
Seamounts and Plate Movement Hawaiianemperorseamount.mov
Hot Spot Locations Hawaii Wyoming (Yellowstone National Park)