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Chapter 2 The Earth in Space Page 22

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					  Tuesday, September 20, 2011
BELLWORK: question: How many
  vocabulary words were actually in section
  2-1? Answer___________________
SOL objectives today: ES 1, 2, 3, 8
Assignments: 1- turn in your 2-1 vocab
2- notes for 2-1.
3- vocab for 2-2 if we get to it.
   Wednesday, September 21, 2011
 Bellwork: How was this picture taken?




                           ‘Earth Rising’

SOL objectives today: ES 1, 2, 3, 8
Assignments: 1- notes for 2-1.
2- vocab for 2-2 if we get to it.
    Thursday, September 22, 2011
BELLWORK: Earth is the planet we live on. Salt
  water covers about 71% of the surface of the
  earth. The crust covers the solid, rocky part of the
  earth. Scientists use an 11-letter word to refer to
  the solid part of the earth. What is the word?
  L____________
SOL objectives today: ES 1, 2, 3, 8
Assignments: 1- continue notes for 2-1
2- worksheet for 2-1
2- vocab for 2-2 if we get to it.
Chapter 2 The Earth in Space
          Page 22
              Objectives:
• List the characteristics of the earth’s 3
  major zones
• Explain how studies of seismic waves have
  provided information about the earth’s
  interior.
• Define magnetosphere and identify the
  possible source of the earth’s magnetism
• Summarize Newton’s law of gravitation.
   §2-1 Earth: A Unique Planet
• Only known planet to have liquid water
• Atmosphere with Oxygen
• Only planet with Life as we know it
  today.



         Remember “Goldilocks & the 3 Bears” ?
Statistics
             • Equator ≈ 40,074 km
             • Pole to pole ≈ 20014 km
             • From the Marianas Trench
               to the top of Mt. Everest is
               only a distance of 20 km
                          The Earth’s Axis
23.5º tilt currently – it can change as the earth wobbles--
PRECESSION
Hydrosphere
   • The earth is covered by
     mostly water => ¾
   • 97 % is in the oceans
   • 2 % in the polar ice caps
   • 1 % in lakes & rivers
Earth’s Atmosphere: • A blanket of gases
                        – Allows you to Breath
                        – Blocks UV
                          Radiation
                      • 78 % nitrogen
                      • 21 % oxygen
                      • 1%
                         – Argon
                         – Carbon dioxide
                         – Helium, etc.
The Earth’s Interior
The MOHO
• Discovered in
  1900
• Place where the
  speed of seismic
  waves Increases
  when going
  through the upper
  mantle.
             The Earth as a Magnet




Magnetosphere
   The area of space around the earth that is affected by the
    Earth’s magnetism
   Caused by the iron in the core of the earth
Law of Gravitation
     Discovered by Sir Isaac
      Newton
     Weight is a measure of the
      pull of Gravity
       Newtons (N)
       Pounds (lbs)
     If Gravity changes, then
      your weight will change
              Assignment

• §2-1 Earth: A unique planet worksheet

				
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posted:12/18/2011
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