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Ppt s2u3 the_universe


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Ppt s2u3 the_universe

  1. 1. The Universe
  2. 2. The Universe  There are a lot of celestial bodies in the universe: stars, planets and satellites.  Stars are big balls of gas. They produce light and heat.  Planets are celestial bodies. They rotate around a star.  Satellites are celestial bodies. They rotate around a planet.
  3. 3. The stars and the Sun  Stars are not all the same. They are different sizes and colours. Stars have different temperatures.  The Sun is a star. It is the nearest star to the Earth.  Stars form groups of stars called constellations.  It is a medium sized star.  The Sun is very important. Life exists on Earth because of the Sun.
  4. 4. The Planets  There are eight planets in the solar system. The planets rotate around the Sun.  Jupiter is the biggest planet. Mercury – Venus – Earth – Mars – Jupiter –Saturn – Uranus – Neptune  Mercury is the smallest planet.  Saturn has rings.  Earth is between Venus and Mars.
  5. 5. The Earth  We live on the planet Earth. The earth rotates around its axis – on imaginary line through the North and South Poles.  Most of the earth is covered by water.  The imaginary line around the middle of the Earth is called the equator. It is the widest part of the Earth.
  6. 6. How the Earth moves  The Earth rotates around its axis. It takes 24 hours to complete the rotation. This movement produces day and night in different places on Earth.  The Earth moves around the Sun. It takes 365 days (a year) to move around the Sun. This movement produces the four seasons: spring, summer, autumm and winter.  When it is day in London, it is night in Australia.
  7. 7. The Moon  The Moon is a satellite. It moves around the Earth.  The Moon has four phases: full moon, first quarter moon, new moon and third quarter moon.  The Moon does not produce light. It reflects the light from the Sun.
  8. 8. Cardinal points  Cardinal points help us orient ourselves.  The Sun rises in the east and sets in the west. We can use a compass to orient ourselves or we can use the Pole Star.  The cardinal points are north, south, east and west.
  9. 9. Powerpoint realizado por Myriam Malo.