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Lecture 3 - PowerPoint PPT Presentation


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Science is built of facts the way a house is built of bricks, but an accumulation of facts is no more science than a pile of bricks is a house. - Henri Poincare ’ Creation and development of the Earth. Lecture 3. Webpage for course (daytime). Webpage for course (nighttime).

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lecture 3

Science is built of facts the way a house is built of bricks, but an accumulation of facts is no more science than a pile of bricks is a house.

- Henri Poincare’

Creation and development of the Earth

Lecture 3

Webpage for course (daytime)

Webpage for course (nighttime)

slide2

Observations about our Solar System1. planets, moons, asteroids form ring @ sun 2. all these revolve in same direction 3. most have similar orientations 4. most rotate in same direction, as does sun 5. many moons have same general features 6. distribution of planets Terrestrial vs. Jovian

how did earth become molten

Sources of heat

- impact of meteorites

- compression

- radioactive decay

How did earth become molten?

this history explains

Thin crust

Differentiation of earth by density

heavy material in middle of earth (core)

lighter material in crust

intermediate density in mantle

Formation of atmosphere

convection cells in mantle

This history explains