THEY+1.1

toc =1.1 Earth's Crust in Motion=

Vocabulary

 * Geologists:** scientists who study the forces that make and shape the earth
 * Geology**: the study of planet Earth
 * Constructive forces**: forces that build up landmasses like mountains
 * Destructive forces**: forces that slowly wear away mountains and surface such as what an ocean does
 * Continents**: seven large landmasses on earth
 * Seismic waves**: waves that move through the Earth's interior
 * Pressure**: force pushing on a surface or area
 * Cust**: layer of rock that makes up the Earth's outer skin
 * Granite**: rock with larger crystals that is less dense than basalt and makes up the continental crust
 * Mantle**: layer of hot rock below the crust
 * 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

The Crust

 * Continental
 * Granite
 * Light colored rock
 * Oceanic
 * Basalt

The Mantle

 * The mantle is a layer of hot rock
 * The uppermost part of the mantle and the crust makes the lithoshere

The Core

 * The core has two layers
 * The two layers are the inner and the outer core

Earth's Magnetic Field

 * The earth has two poles, the north and the south pole
 * Those poles act like a giant bar magnet