MLEG1.1

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Vocabulary

 * Geologists:** scientists who study the forces that make and shape the earth
 * Geology**: the study of planet Earth's land surface
 * constructive forces**: forces that build up landmasses like mountains on Earth's surface
 * destructive forces**: forces that slowly wear away mountains and surface such as what an ocean does to rocks
 * continents**: seven large landmasses on earth
 * seismic waves**: a vibration that travels through Earth carrying the energy released during the earthquake
 * pressure**: force pushing on a surface or area
 * crust**: layer of rock that makes up the Earth's outer skin
 * basalt**: a dark, dense, igneous rock with a fine texturefound in oceanic crust
 * granite**: a usually light-colored rock found in continental crust
 * mantle**: layer of hot, solid material Earth's crust and core
 * lithosphere**: means "**stone**" and is the mantle and crust together
 * asthenosphere**: means "**weak**" soft rock material that can flow slowly
 * outer core**: layer of **molten** metal that surrounds the inner core
 * inner core**: dense ball of **solid** metal

Science of Geology

 * studying surface changes
 * surface always changing
 * finding indirect evidence
 * cannot see inside earth
 * use seismic waves
 * speed of waves tells the material

Center of the Earth

 * temperature
 * surface rock is cool
 * 20 meters/warmer
 * every 40 meters 1 degree celsius hotter
 * boy that's hot
 * pressure
 * deeper you the greater the pressure