Unit 7 Whiteboard Review Tectonic Plates and Topographic Maps

Plate Tectonics Draw force arrows for a convergent boundary Two plates that go towards each other What type of landform do two continental plates that converge make? Mountains What type of zone is made by a convergent boundary? Subduction zone

Plate tectonics What two landforms do subduction zones make? Trenches and volcano formation What type of boundary occurs when two tectonic plates slide horizontally past each other? Transform What type of things do transform boundaries cause? Volcanic and earthquake action, fault lines

Plate Tectonics Describe how divergent boundaries move? The plates move apart from each other Describe some things that are created by divergent boundaries. Mid-oceanic ridges, and sea floor spreading. Describe what seafloor spreading creates. New oceanic crust

Plate Tectonics Which letter would represent the youngest crust on the mid-oceanic ridge? B C B A

Scientist What is the name of the scientist who has the continental drift theory? Alfred Wegener Who is the scientist who proposed the Law of Superposition? Nicholas Steno Who is the scientist who came up with the Law of Cross-cutting? James Hutton

Plate Tectonics What is the layer of the earth that moves the tectonic plates? Asthenosphere What is the name of the rocky layer that is broken into tectonic plates? Lithosphere Is the outer layer of the core liquid or solid? Liquid

Plate Tectonics What proof or evidence did Wegener have of continental drift? (name as many as you can) Same fossils on different continents, glacier deposits and mountain ranges in South America and Africa, and continents “fit” together.

Plate Tectonics What two continents did Wegener first notice? About their mountain ranges and glacier deposits. South America and Africa What type of plate boundary has caused the formation of the “ring of fire”? Convergent boundary (subduction zones) What type of plate boundary makes NEW crust on Earth? Divergent boundary ( sea floor spreading)

Plate Tectonics What theory says that the continents are moving on tectonic plates? Continental Drift Theory What is Pangaea? Supercontinent that existed that contained all continents on earth What is the driving force behind tectonic plate movement? Convection currents

Topographic Maps What do Topographic maps show? Elevations or depressions of landform The arrows that are show similar to ‘v’s point upstream or downstream? Upstream Lines that are closer together on topo. Maps represent what? Steep slopes

Rock Layers What does the Law of Superposition say about rock layers? Older layers are on bottom and younger layers are on top. Which law applies to rocks that cut through layers of rocks? Law of Cross-cutting

Rock Layers Which layer is the youngest? C Which layer is the oldest? B A C B

Topographic Maps Which direction is the river flowing? Northeast Where would the delta be located? Northeast (at the mouth of the river)

Topographic maps What is the contour interval? 50 Estimate what you think the elevation at the peak would be Higher than 400, less than 450 Does the landform start at sea level? No – starts at 50 Which part of the landform is the steepest? Northwest 350 250 150 50