Plate Tectonics Jeopardy Earth Layers Theories Boundaries Earthquakes

Plate Tectonics - Jeopardy Earth Layers Theories Boundaries Earthquakes and a few other things 10 10 20 20 30 30 40 40 50 50 60 60 70 70 80 80 90 90 Final Jeopardy

Boundaries: 80 points What type of boundary is this? oceanic – oceanic divergent

Boundaries: 90 points What type of boundary is this? Continental – continental convergent

Earths Layers: 90 points What causes the mantle to be hot enough for convection to occur there? Radioactive decay in the Earth’s core releases energy to the mantle – some areas are hotter than others

Earths Layers: 10 points What is the inner most layer of the earth called? Inner core

Earths Layers: 20 points What is the outermost layer called? crust

Earths Layers: 30 points Describe the physical properties of the asthenosphere. Solid but acts like plastic – convection occurs in it.

Earths Layers: 40 points What is the lithosphere made up of (layers included)? Crust plus the outermost mantle

Earths Layers: 50 points What is the state of the outer core and what is it made of? Liquid – iron and nickel

Earths Layers: 60 points What is the state of the inner core and what is it mainly made of? Solid - iron

Earths Layers: 70 points What is the thickest single layer of the earth? The mantle– 3000 km

Theories: 10 points What is the supercontinent that existed 270 million years ago? Pangaea

Theories: 80 points Where does sea floor spreading take place and what does it mean? Mid ocean ridge – divergent boundary – the ocean floor is getting wider

Theories: 20 points Geometry (puzzle piece) is evidence of what theory? Continental drift

Theories: 30 points Give one other piece of evidence for continental drift Puzzle fit, matching mountain ranges, ancient fossils on distant coast lines, coal deposits in Antarctica, glaciers in Africa

Theories: 40 points What was missing from Wegner’s theory of continental drift? He didn’t know how the movement occurred (theory of plate tectonics was unknown)

Theories: 50 points In order for Antarctica to have tropical coal deposits – where must it have been located before? Near the equator or in the tropics

Theories: 60 points What was discovered during the World War II that helped form theory of plate tectonics? Mid – Atlantic ridge

Theories: 70 points Give one piece of evidence for sea floor spreading Magnetic reversal patterns, radioactive dating, volcano and earthquake patterns

Boundaries: 30 points What forms at a continental divergent boundary? Rift valley

Boundaries: 20 points What forms at a oceanic- oceanic divergent boundary Mid ocean ridge

Boundaries: 60 points What forms at a continental convergent boundary Mountain range

Boundaries: 50 points What forms at a oceanic-oceanic convergent boundary Island arc, trench

Boundaries: 40 points What forms at an oceaniccontinental convergent boundary? Trenches, mountain ranges

Boundaries: 10 points What type of events takes place at a transform boundary? Earthquakes, faulting

Earths Layers: 80 points Describe mantle convection – how does affect the plates? Hot mantle rises, cools and sinks – carrying the plates with it

Boundaries: 70 points Describe subduction and where/why it takes place The denser plates goes below the less dense plate – so oceanic will subduct below continental. Gravity helps pull the denser plate down into the mantle.

Earthquakes & Other: 10 points What is a hot spot? And what can it cause? An area of very hot mantle, heated by concentrated radioactive substance in the core – it forms volcanoes

Earthquakes & Other: 20 points Where is the focus found and what starts there? Down in the lithosphere (crust) – earthquakes start there

Earthquakes & Other: 30 points Where is the epicentre found compared to a focus? On the surface directly above the focus

Earthquakes & Other: 40 points What is the difference between a shallow and deep-focus earthquake In the crust vs. down into the mantle

Earthquakes & Other: 50 points What is the difference between a P and S wave P waves are faster (compression/expand) than S waves (move up and down) Secondary waves cannot pass through liquids

Earthquakes & Other: 70 points How do Seismic waves (P and S) tell us about the composition of the earth’s core? Secondary waves can not pass through liquids so by monitoring waves from earthquakes you can detect that the outer core must be liquid.

Earthquakes & Other: 60 points What is ridge push? The hot mantle pushes the crust up as the ridge forms.

Earthquakes & Other: 80 points What is slab pull? The slab is pulled down by gravity as the plate subducts

Final Jeopardy Why are older mountains and volcanoes smaller than younger ones, such as the Himalayas? If tectonic activity has slowed or ceased in an area, the effects of weathering and erosion will no longer be “balanced” by mountain-building processes, causing the particular landform to become smaller