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The structure of the Earth

The structure of the Earth. By the end of the lesson you will be able to: Label a diagram of the structure of the earth Recall the composition of each of the layers of the Earth Describe how scientific ideas about Earth have changed in history. 1 km. 20 km. 120 km. Crust. 2000 km.

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The structure of the Earth

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  1. The structure of the Earth By the end of the lesson you will be able to: Label a diagram of the structure of the earth Recall the composition of each of the layers of the Earth Describe how scientific ideas about Earth have changed in history.

  2. 1 km 20 km 120 km Crust 2000 km Mantle 3500 km Outer Core Inner Core 6000 km

  3. Bristol If you start on the Earth’s surface how far down would you go if you travelled the same distance as the distance between London and: Barcelona New York Paris

  4. The distance from London to: Bristol = 200 km New York = 5586 km Barcelona = 1183 km Paris = 343 km

  5. How old is the Earth? World’s oldest rock discovered in Canada (approx 4 billion yrs) Noticed Hadrian’s wall had not aged in 1500 years, suspected Earth to be much older than 6000 years old Decay of rocks to lead dated earth at 1.64 billion years Earth was created 26th Oct, 4004 BC, @ 9:00 am Time taken for sea to become salty estimated 100 million years Decay of Uranium dated earth at 500 million years Time taken for Earth to solidify estimated 30 million years 1650 1770 1900 2010 Charles Lyell Archbishop Usher John Jolly Ernest Rutherford Boltwood Lord Kelvin James Hutton

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