Topic 1 - The Earth Specification:

• Know that the shape of the Earth is an oblate spheroid
• Be able to use information about the mean diameter of the Earth (13 000 km)
• Understand the Earth’s major internal divisions and their features:
🡒 crust
🡒 mantle
🡒 outer core
🡒 inner core
• Be able to use the latitude and longitude co-ordinate system
• Be able to use the major divisions of the Earth’s surface as astronomical reference points, including:
🡒 Equator
🡒 Tropic of Cancer
🡒 Tropic of Capricorn
🡒 Arctic Circle
🡒 Antarctic Circle
🡒 Prime Meridian
🡒 North Pole
🡒 South Pole
• Understand the effects of the Earth’s atmosphere on astronomical observations, including sky colour, skyglow (light pollution) and ‘twinkling’ (seeing)

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