Do Now: Describe the difference between the two shapes below.

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Earth's Shape 4

Is the Earth flat? 5

Square? 6

List 3 things that you see! 7

Is the Earth a perfect sphere? The Earth’s true shape is an oblate spheroid It is slightly flattened at the poles and slightly bulging at the equator. 8

However, if drawn to scale, it looks like a perfect sphere! 9

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What are the two most common elements in the crust?

Spheres of the Earth: Lithosphere The part of the Earth that is solid (the land)

Parts of the Lithosphere: What could cause the oceanic crust to sink under the continental ctust?????? Continental Crust – thick Oceanic Crust - thin

Hydrosphere The water on the Earth The hydrosphere covers 75% of the Earth

What are the two most common elements in the Hydrosphere?

Atmosphere The air (gases) that we breathe What is the most common gas we breathe?

Air is made up mostly of Nitrogen (78%) and Oxygen (21%) What is the most common element in the atmosphere (troposphere)?

Troposphere

Stratosphere

Mesosphere

Thermosphere

EARTHS INTERIOR

What layers make up the Earth’s interior? Crust: Solid layer of oceanic and continental rock Mantle: Layer of hot dense rock that the crust floats upon. Outer core: Layer of liquid Iron and Nickel Inner core: Solid layer of Iron and Nickel

How do speed cameras know how fast your going????