Earths-Interior.pdf

 TRIVIA Chocolate is good for your skin; its antioxidants improve blood flow and protect against UV damage  Earth science Earth science is the study of the Earth's structure, properties and processes,  5 Sphere Atmosphere – air Hydrosphere – water Geosphere – earth/land Bio...

 TRIVIA Chocolate is good for your skin; its antioxidants improve blood flow and protect against UV damage  Earth science Earth science is the study of the Earth's structure, properties and processes,  5 Sphere Atmosphere – air Hydrosphere – water Geosphere – earth/land Biosphere – life Cryosphere - ice  Oblate spheroid 3rd planet from the Sun Earth is the fifth largest planet in the solar system Earth is an oblate spheroid “because its spin causes it to be squashed at its poles and swollen in the equator Average distance from the sun (149,598,262 km) Earth is approximately 4.6 billion years old  Earth’s interior  Earth’s layers  The three main layers make up Earth’s interior: The crust The mantle The core (inner & outer)  Crust Outermost shell of the earth Composed of oceanic and continental crust  Oceanic crust (denser)  Oceanic is made of basalt-a dense, dark, fine coursed rock.  Continental crust (less dense Continental is made of granite. Basalt Granite  MOHOROVICIC DISCONTINUITY The boundary between the crust and mantle Named after Andrija Mohorovicic in 1909  Mantle The mantle is the mostly- solid bulk of Earth's interior. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.  What is lithosphere?  The crust and the upper part of the mantle is the lithosphere  100 km thick  Less dense than the material below, so it floats  Asthenosphere  It is the plastic layer below the lithosphere  The plates on the lithosphere floats on the asthenosphere Gutenberg discontinuity Boundary between the mantle and outer core Named after Beno Gutenberg  Convection current Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks  Outer core  The outer core, about 2,200 kilometers thick, is mostly composed of liquid iron and nickel.  The outer core is very hot, between 4,500° and 5,500° Celsius  Generates magnetic field  Shields earth from harmful radiation from the sun  Lehmann Discontinuity Region between outer and inner core Named after Danish seismology and geophysicist Inge Lehmann Inner core  The inner core is a hot, dense ball of (mostly) iron.  It has a radius of about 1,220 kilometers (758 miles).  Temperature in the inner core is about 5,200° Celsius  The pressure is nearly 3.6 million atmosphere (atm). Quiz  1.continental crust is composed of what type of rock?  2. it is the plastic layer in the mantle where lithosphere floats?  3. which part of earth generates magnetic field  4. it is the outermost layer of the earth?  5.what type of current happens in the mantle that caused the movement of plate