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Geo: Unit 1, Chapter 2 Powerpoint

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notes on chapter 2

notes on chapter 2

Published in: Technology, Education
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Transcript

  • 1. Mr. Philen’s notes on Chapter 2, section 1
  • 2. Chapter 1, section 1: the Earth
    • Englishman Francis Bacon “first” suggested Earth fit together like a jigsaw puzzle in 1620.
  • 3. The Earth
    • 3 rd planet in Milky Way Galaxy
    • 93 million miles from sun
    • Earth’s solar system consists of sun, planets, celestial bodies
    • You should know the order of the planets
    • Comets: spheres covered with ice and dust, leave trails of vapor
    • Asteroids: large chunks of rocky material
  • 4. The Earth – inside
    • 24,900 miles in circumference/7,900 miles in diameter
    • Core of earth made of iron and nickel
    • Outer core is liquid
    • Mantle has several layers (most of earth’s mass)
    • Magma (molten rock) forms in mantle and rises through crust
    • Crust – thin layer of rock at earth’s surface
      • Continent/ocean
      • Continental and oceanic crust
  • 5. Earth’s insides…refer to page 28
    • http://martianchronicles.files.wordpress.com/2008/08/103949main_earth10.jpg
  • 6. The Earth - outside
    • Atmosphere – surrounds earth; layer of gases – Oxygen, Nitrogen, etc…protects earth from radiation and space debris; provides medium for weather and climate
    • Lithosphere – crust and upper mantle – 7 continents: North America, South America, Europe, Asia, Africa, Australia, Antarctica
    • Hydrosphere – water elements of earth (oceans, seas, rivers, lakes, water in atmosphere)
    • Atmosphere + Lithosphere + Hydrosphere = Biosphere ( where plants and animals live)
  • 7. Continental Theory
    • In 1912 German Alfred Wegener suggested Continental drift theory
    • “ earth was once supercontinent that slowly drifted apart)
    • Pangea (“all earth”)
    • Panthalassa (ocean surrounding Pangea)
    • Split/separation took millions of years
    • Earth is still splitting – proof – in middle of ocean rocks are youngest in world…
  • 8. End Section 1
    • Questions for thought:
    • What are the elements of the biosphere?
    • How might the Earth’s inner core affect the biosphere? And vice versa
    • Discuss the continental theory. How do you think this theory affected people? (think about this in social and scientific terms)
    • PLEASE, review your notes, complete your reading…

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