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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
 * Crust -** layer of rock that makes up the Earth's outer skin
 * Basalt -** dark, dense rock that forms the oceanic crust
 * 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

Earth's magnetic field
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