1. Earth’s Surface Review
Drill: Which sphere does a plant belong to; Geosphere, Atmosphere, Hydrosphere, or Biosphere?
How does it interact with the other spheres?
Objective: Students will be able to utilize the lesson outline in order to prepare for the test.
HW: Test on Thursday.

2. Earth’s Sphere
Geosphere: Earth’s entire solid body. It includes rocks and sediments that cover the core. The largest of the spheres.
Biosphere: All living organisms on Earth. They interact with all other spheres.
Atmosphere: Outermost system, it is the layer of gasses that surround Earth.
Hydrosphere: Earth’s waters. It can be on the surface, underground, or in the atmosphere.

3. Formation of Earth
Nebular Theory: Theory that the sun and all the planets were formed from a swirling mass of gas and dust.
Gravity pulled materials in all directions to make Earth spherical.
Densest materials pulled to the center.
Earth is not a perfect sphere but slightly flattened.

4. Layers of Earth
Crust: Brittle rocky outer layer. Thinnest of all layers
Mantle: Thick middle layer of the earth. Consists of upper and lower
Outer Core: Liquid center portion of Earth. Made of iron and nickel.
Inner Core: Inner most portion of core. Made of solid iron and nickel.
Lithosphere: Crust and the upper most mantle which consists of heated brittle rock.
Asthenosphere: Below the lithosphere, it is the liquid portion of the mantle where tiny rocks melt.
Magnetic field: Created by the rubbing of the inner and outer due to their different rates of spin.

5. Landforms: Topographical features formed by processes that shape Earth.
Plains: Low elevation and low relief (difference in height).
Coastal and Interior
Plateaus: High elevation and low relief.
Appalachians and Rocky Mountains.
Mountains: High elevation and high relief.
Piedmont, Appalachian, Ozark, Colorado, and Columbia Plateau