+ Elective Geog (New) Secondary 3 E Week 4: Living with Tectonic Hazards
+ 2 Lesson Outcomes By the end of the lesson, we will be able to describe the global distribution of tectonic plates and types of plate boundaries.
+ 3 Jig Saw Puzzle Eachenvelope contains a cut out world map which shows the names of plates and their boundaries. Inyour groups, try to piece together your jigsaw pieces and stick it onto a piece of paper.
+ 4 How would you describe the pieces of the jigsaw? What do the lines represent? Which continent do we live in? What observations can you make about the plate and the related continent that we live in?
+ 5 Important Note! Plates are NOT continents Plates include both continental and oceanic crust.
+ 10 Divergent Plates Areaswhere two plates move away from each other Magma moves upward to the surface where it cools to form new oceanic crust along these boundaries Oceanic-oceanic Continental-continental
+ 11 Oceanic-oceanic At various points along the ridge, magma The newly formed (youngest) rocks are builds up above the ocean to form volcanic closest to the middle of the ridge/plate islands. boundaries. Magma rises at the zone of New sea floor is formed when the magma divergence/spreading zone to form a ridge of Magma rises from the mantle to fill the gap cools and solidifies. This process is called new ocean floor called mid-oceanic ridge. between the plates as they diverge. sea-floor spreading.
+ 20 Continental-continental How to draw? Pg 23
+ 21 Rift valleys and Block mountains A fault Fracture in the rocks along which the rocks are displaced Rift Valley Is a valley with steep sides that is formed when the sections of the crust extend along fault lines Block Mountain A block of land with steep sides