SUN
          
        
        
          
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            p
          
        
        
          
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            c
          
        
        
          
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            o
          
        
        
          
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          21-22 March
        
        
          
            spring equinox
          
        
        
          21-22 December
        
        
          
            winter solstice
          
        
        
          21-22 June
        
        
          
            summer solstice
          
        
        
          22-23 September
        
        
          
            autumn equinox
          
        
        
          Understand
        
        
          8.
        
        
          Listen and say true or false. Correct the false sentences.
        
        
          Analyse
        
        
          9.
        
        
          Locate Spain and Australia on a political world map. What time of
        
        
          the year is the longest day in Spain? And in Australia? Explain why.
        
        
          10.
        
        
          Compare the four photos above of the same place in different
        
        
          seasons. Identify the main differences and explain what causes
        
        
          them.
        
        
          Create
        
        
          11.
        
        
          If the Earth rotates on its own axis
        
        
          and moves in space around the
        
        
          Sun, why can’t we feel the Earth
        
        
          moving? Investigate and write
        
        
          your finding in your notebook.
        
        
          
            1
          
        
        
          1. The planet Earth and its representation
        
        
          
            15
          
        
        
          THE SEASONS IN THE NORTHERN HEMISPHERE
        
        
          Spring
        
        
          Spring begins with
        
        
          the
        
        
          spring equinox
        
        
          . At this time,
        
        
          the Sun’s rays fall directly on the
        
        
          Equator. Days and nights are the
        
        
          same length, 12 hours. (In the
        
        
          Southern Hemisphere it is autumn.)
        
        
          Winter
        
        
          Winter begins with
        
        
          the
        
        
          winter solstice
        
        
          . At this time,
        
        
          the Sun’s rays fall directly on the
        
        
          Tropic of Capricorn. This is when
        
        
          the days are shortest and coldest in
        
        
          the Northern Hemisphere.
        
        
          Summer
        
        
          Summer begins with
        
        
          the
        
        
          summer solstice
        
        
          . At this time the
        
        
          Sun’s rays fall directly on the Tropic
        
        
          of Cancer. This is when the days are
        
        
          longest and hottest in the Northern
        
        
          hemisphere. (It is winter in the
        
        
          Southern Hemisphere.)
        
        
          Autumn
        
        
          Autumn begins with
        
        
          the
        
        
          autumn equinox
        
        
          . At this time,
        
        
          just as in spring, the Sun’s rays fall
        
        
          directly on the Equator. Days and
        
        
          nights are the same length.