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Gravity lesson

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Gravity lesson

  1. 1. KS2 Science Forces Gravity: What goes up must come…. DOWNDOWN
  2. 2. What do you think will happen in this tug-of-war?
  3. 3. Gravity – what is it? • is an attractional force between objects. • Gravity acts on the Earth by pullingpulling objects towards its centre • Bigger objects have more gravity so since the Earth is bigger than everything on the Earth, everything is pulled towards the Earth!
  4. 4. Gravity – what is it? Which arrow is pointingWhich arrow is pointing thethe wrongwrong way?way?
  5. 5. Gravity – what is it? No, try again.No, try again.
  6. 6. Gravity – what is it? Yes, it’s this one
  7. 7. Who discovered it? • It was Sir Isaac Newton that ‘worked-out’ gravity. • 1643 – 1727 • He was the greatest English mathematician of his generation. His work on optics and gravitation make him one of the greatest scientists the world has known.
  8. 8. Who discovered it? The story goes that he was sitting under an apple tree and an apple fell onto his head. He went to to explore why it fell down and came up with a theory and mathematical equation.. He named it GRAVITY.
  9. 9. But what about gravity on different planets? http://www.bbc.co.uk/learningzone/clips/gravity-earth-jupiter- and-pluto/1599.html http://www.exploratorium.edu/ronh/weight/
  10. 10. But what about gravity on different planets? http://www.bbc.co.uk/learningzone/clips/gravity-earth-jupiter- and-pluto/1599.html http://www.exploratorium.edu/ronh/weight/

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