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KAPITTEL 2
Indre krefter og de store landformene på jorda
KOMPETANSEMÅL
• Gjøre greie for hvordan jorda er oppbygd, hovedtypene av bergarter
og hvordan de blir dannet
• Forklare hvordan indre og ytre krefter former landskap, og kjenne
igjen typiske landformer i Norge
• Drøfte årsakene til naturkatastrofer i verden og hvilke virkninger de
har på samfunn som blir rammet
JORDEN BEVEGER SEG!
• Arrogant geolog Charles Hapgood
• Rikmannssønn Frank Bursley Taylors
mener Sør-Amerika og Afrika passer
sammen
• Meteorolog Alfred Wegener og
Pangaea
• Arthur Holmes daterer jorden og
senere foreslår konveksjonsceller i
kjernen.
HVOR BLIR DET AV SEDIMENTENE?
• Mineralogist Harry Hess kalles inn i marinen
under WW2
• Fathometeret som krigsinstrument
• Samlebånd i Atlanteren «midthavsryggene»
• Platedriftteorien blir akseptert av de fleste
forskere i 1964
JORDAS OPPBYGNING
Tredelt oppbygning
1. Jordskorpe
2. Mantel
• Øvre og Nedre
3. Kjerne
• Indre og Ytre
Litosfæren og Astenosfæren
PINPOINT HENDELSE TIL KARTET
Kjente Vulkaner
• Vesuv
• Krakatoa
• Mt.Helena
• Eyjafjallajökull
• Cotopaxi
• Mt.Pelée
Kjente Jordskjelv
• San Francisco 1906
• Tokyo 1923
• Anchorage 1964
• Sumatra 2004
• Tangshan 1976
• Bio-bio 1960

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Kapittel 2-del1

  • 1. KAPITTEL 2 Indre krefter og de store landformene på jorda
  • 2. KOMPETANSEMÅL • Gjøre greie for hvordan jorda er oppbygd, hovedtypene av bergarter og hvordan de blir dannet • Forklare hvordan indre og ytre krefter former landskap, og kjenne igjen typiske landformer i Norge • Drøfte årsakene til naturkatastrofer i verden og hvilke virkninger de har på samfunn som blir rammet
  • 3. JORDEN BEVEGER SEG! • Arrogant geolog Charles Hapgood • Rikmannssønn Frank Bursley Taylors mener Sør-Amerika og Afrika passer sammen • Meteorolog Alfred Wegener og Pangaea • Arthur Holmes daterer jorden og senere foreslår konveksjonsceller i kjernen.
  • 4. HVOR BLIR DET AV SEDIMENTENE? • Mineralogist Harry Hess kalles inn i marinen under WW2 • Fathometeret som krigsinstrument • Samlebånd i Atlanteren «midthavsryggene» • Platedriftteorien blir akseptert av de fleste forskere i 1964
  • 5. JORDAS OPPBYGNING Tredelt oppbygning 1. Jordskorpe 2. Mantel • Øvre og Nedre 3. Kjerne • Indre og Ytre Litosfæren og Astenosfæren
  • 6. PINPOINT HENDELSE TIL KARTET Kjente Vulkaner • Vesuv • Krakatoa • Mt.Helena • Eyjafjallajökull • Cotopaxi • Mt.Pelée Kjente Jordskjelv • San Francisco 1906 • Tokyo 1923 • Anchorage 1964 • Sumatra 2004 • Tangshan 1976 • Bio-bio 1960