Crust- a layer of rock.It is very thin. Forms earth's outer skin. It is 5-40 kilometers thick. It has no inflence on the earth.
Mantle- it is a hot layer of hot rock. It is the middle layer. Mantle is nearly 3,000 kilometers thick. Part of a terrestial planet. The outer mantle is thinner than the inner mantle. It is the thickest mantle.
Core- Has two parts. Outer core and inner core.
OC- monlten metal. thick liquid
IC- solid metal, extreme pressure
Outer Core and inner core= 1/3 of Earth's mass, inner core and outer core are slightly smaller than the moon.
Geoligists- scientists who study the forces that make and shape planet Earth
Geology- the study of planet Earth
Constructive forces- shape the surface by building up mountains and landmasses
Destructive forces- slowly wear away mountains and, eventually, every other feature on the surface.
continents- the 7 great landmasses.
Seismic wave- a vibration that travels through Earth carrying the energy released during an earthquake
Pressure- is the force pushing on a surface or area
3 main layers of the Earth- The crust, mantle, and the core
Crust- is a layer of rock that forms Earth's outer skin
Basalt- a dark, dense with a fine texture
Granite- is a rock that has larger crystals than basalt and is not as dense.
Mantle- a layer of hot rock
Asthenosphere- a soft layer of Earth
Outer core- is a layer of molten metal that surrounds the inner core
Inner core- is a dense ball of solid metal
3 types of heat transfer- radiation, conduction, and convention.
Radiation- the transfer of energy through empty space
Conduction- heat transfer by direct contact of particles of matter
Convection-is heat transfer by the movement of a heated fluid
Density-is a measure of how much mass there is in a volume of a substance
Convection current- is the flow that transfers heat within a fluid
The heating and cooling of the fluid, changes in the fluid's density, and the force of gravity combine to set convection currents in motion.
Wegener's hypothesis was that all the continents had once been joined together in a single landmass and have since drifted apart
Pangaea- Wegener's name for the supercontinent
Continental drift- Wegener's idea that the continents slowly moved over Earth's surface
fossil- is any trace of an ancient oranism that has been preserved in rock
unfortunately, Wegener could not provide a satisfactory explanation for the force that pushes or pulls the continents.