8058459
Description
Flashcards by Steven Morgan, updated more than 1 year ago
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Created by Steven Morgan
about 7 years ago
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| Question | Answer |
| Constructive Plates Pull Apart Creates new crust Usually underwater Mid Ocean Ridge American/Eurasian plate Magma cools & hardens Basalt | |
| Destructive Plates Destroys crust Plates collide/crash into each other Ocean trench Heavier plate pushed into mantle Volcanic mountain ranges | |
| Mid Atlantic ridge Underwater mountain range Constructive plates American/Eurasian Volcanic islands (Iceland) 16,000km long Basalt rock Taller than Mt Everest | |
| Earth's Structure Crust; outside 10-70km thick Mantle; under crust, semi molten rock called magma Core; nickel& iron, solid, over 5,000 degrees. | |
| Plates collide/slip past each other Release of energy (tremors) (A)Focus; Point of contact (C)Epicenter; On surface directly above focus. (D)Fault line; Boundary between plates. Aftershocks; small tremors after main quake. | |
| Volcano Plates separate Cone; Shape of mountain Crater; Lava escapes here Vent; How magma gets to crater Magma Reserve: Where magma is stored. Lava: Magma on surface | |
| Fold Mts Destructive plates (collide). Light plates buckle up. Andes, Rockies, Himalayas Indian & Eurasian plate Tallest Mts in world Alpine Fold most recent Armorican Fold (Ireland) | |
| Tsunami Earthquake out at sea. Large wave made by tremors. Very destructive Japan 2011 Eurasian/Pacific plates collide Gets taller near shore Travels over 800km per hour | |
| Pangaea Large landmass. Theory of continental drift. Plates moved by convection currents. Very slow movement. | |
| Seismograph Machine used to MEASURE tremor strength. A RICHTER SCALE is a descriptive scale used to describe its force. |
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