Earths Interiorinside Geologist A geologist is a scientist

Earth’s Interior=inside

Geologist • A geologist is a scientist that studies the forces that shape earth’s surface • 200 years ago was the start of geology • Geology is fairly new

Rock • The material that forms Earth’s surface • Geologists study rocks

Forces that shape Earth • Constructive • Destructive

Constructive • Building up Ex. Construction The building (MS) was changed constructively.

Constructive • Mountain ranges forming(slowly) • Over millions of years

Destructive • Forces that slowly wear down the Earth’s surface • Destroy =Destruction

Destructive • Erosion by wind and water • Think of our local beaches

Journey to the Center of the Earth • Temperature increases • Pressure increases

How do we know what inside Earth is like if we can’t travel through it? • Scientist know this by studying seismic waves/data from earthquakes

If you took that journey you would find layers of the Earth • Crust • Mantel • Core

Crust • • “skin” of earth Like the shell of an egg or onion skin VERY THIN!!!!!! Includes land on bottom of ocean floor – Thinnest under the ocean(basalt) – Thickest under mountains(granite) • Is part of the lithosphere • Most abundant element oxygen then silicon

Lithosphere • Lithosphere means stone • Crust and uppermost mantle • Rigid • Contains plates

Oceanic vs. Continental Crust Oceanic Continental Under oceans Under continents thinner thicker Made of basalt(think salty ocean) Made of granite More dense Less dense

Asthenosphere • • • Gooey/bendable Plastic like rock Convection take place here Found in Upper mantle only NOT A LIQUID!!!! SOLID

Mantle • A layer of hot rock • is also part of the lithosphere

Core Center of the Earth) • Inner core • Outer core

Outer core • Acts like a thick liquid

Inner Core • • dense ball of solid metal Heat source for convection Hotter than the sun Spins-creates earth’s magnetic shield

The Lithosphere • Crust and uppermost mantle Floats on the asthenosphere Broken into pieces- tectonic plates

Crust • Crust part of the (Lithosphere) – Continental – Less dense – Oceanic – More dense

Mantle – Upper Mantle called the asthenosphere