Topic 1 the earth in space
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Topic 1 the earth in space

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Topic 1 the earth in space Presentation Transcript

  • 1. THE EARTH IN SPACE
  • 2. The Earth in Space
    • This is the only planet supporting life and has the most varied surface
    • It is 4.6 billion years old
    • It is the densest body in the Solar System
    • It has one moon
  • 3. How is the Solar System made up?
    • Our Solar System has eight planets that orbit a big star called the Sun
    • All the planets orbit the Sun in elliptical paths
    • The planets, asteroids and comets in the Solar System are loose particles left over from the formation of the Sun
  • 4. How is the Solar System made up?
    • The solar system is made up of two parts:
    • The inner solar system contains Mercury, Venus, Earth and Mars. These four planets are closest to the Sun
    • The outer solar system contains Jupiter, Saturn, Uranus, and Neptune
  • 5. What differences are between the Earth and other planets? This is the eight planet from the Sun and is a giant gas planet with eight moons –the largest one called “Triton” Neptune This planet was visited by the spacecraft Voyager 2 in 1986. It is a blue-green colour and has a faint ring system. It spins differently to other planets Uranus This is the second largest planet. It has beautiful rings made of ice which can be seen from Earth. Its name is the root of the English word “Saturday” Saturn This is the largest planet: It is more than twice as massive as all the other planets combined! It is a giant gas planet and the fifth planet from the Sun. It has a special feature called “the great red spot” Jupiter This is the fourth planet from the Sun. It is cold and lifeless with permanent ice caps. It is often called the “Red planet”. The first spacecraft(Mariner 4) landed on it 1965 Mars This is the only planet supporting life and has the most varied surface. It is 4.6 billion years old. It is the densest body in the Solar System. It has a moon Earth This is a small, rocky planet with layers of yellow clouds made of sulphuric acid. It is very hot(about 400ºC) and extremely windy. It is the second planet from the Sun Venus This is a small rocky planet which is the closest to the Sun. It has an extreme temperature range. Some scientists think volcanoes are active on this planet Mercury
  • 6. What consequences do the Earth’s movements have?
    • Our planet is in continuous movement. It makes two movements:
    • Rotation:
    • The Earth makes a complete rotation on its axis, from west to east, every 24 hours, it causes the alternating of days and nights
  • 7. What consequences do the Earth’s movements have?
    • Revolution:
    • The Earth moves around the sun, in an elliptical orbit. It takes 365 days, to make a complete orbit.
    • This movement has two effects: the succesion of seasons, and the different length of days and nights
  • 8. How is the Earth represented?
    • The most accurate way to show the whole world is on a globe . This is because a globe, being round, shows the actual shape of the Earth. To help us find places, imaginary lines called latitude and longitude, are drawn onto the globe
  • 9. How is the Earth represented?
    • Another type of representation of the Earth’s surface is a map , but it is impossible to draw the Earth accurately on a piece of paper. That is because the Earth is round and a piece of paper is flat. Some places have to be stretched and other squashed to make them fit.
  • 10. http://www.youtube.com/watch?v=PvQagOCnScE&feature=channel
  • 11. http://www.youtube.com/watch?v=swKBi6hHHMA&feature=related
  • 12. How is the Earth represented?
    • There are complex mathematical formulae, called projections , to convert a sphere into a plane. Each type of projection represents some areas better than others, but there is always distortion.