𝓿𝓸𝓵𝓬𝓪𝓷𝓸𝓮𝓼 𝓹𝓪𝓻𝓽 2 (𝔂.8)

• Definition of Pangea


  Supercontinent that existed 200 million years ago
• Definition of tectonic plates


  Sections of the earths crust. There are 15 main ones
• Definition of Continental drift 


  theory proposed by Alfred Wegner where continents move across the earth
• Definition of plate boundary


  Area between two tectonic plates where earthquakes and volcanoes can occur
• Describe the crust


  Thinnest layer, coldest layer, solid, where most earthquakes occur, split into tectonic plates separated by boundary
• Describe the mantle


  Thickest layer, 500-900c, solid at the top molten at the bottom
• Describe the outer core


  4400c, nickel and iron, moves around the inner core to generate magnetic field
• Describe the inner core


  Hottest layer, 5500c, solid, nickel and iron, under most pressure
• How do we know plates used to be together in 1 super continent


  Fossils, rock types, plant species, mountain ranges and the fact they look like visual jigsaw pieces