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Scale & Distance

Scale & Distance. Keywords for today's lesson : Scale Distance Kilometres (KM) Centimetres (CM) Measuring Accuracy. Why do we use scale?. When we make a map … we shrink the real world so that it can fit on a page We use scale to do this….

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Scale & Distance

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  1. Scale & Distance

  2. Keywords for today's lesson:ScaleDistanceKilometres (KM)Centimetres (CM)MeasuringAccuracy

  3. Why do we use scale? When we make a map … we shrink the real world so that it can fit on a page We use scale to do this… Simply put, scale is how much the person making the map has shrunk the real world

  4. So how does it work? 1cm on the map 4km in the real world Simply put, scale is how much the person making the map has shrunk the real world

  5. Kilometres 0 1 2 3 4 5 6 You can measure the distance with a ruler.

  6. 2cm = 1km You can measure the distance in cm Try to be exact! (Each extra mm = .1) Then … divide by 2 to change to km

  7. 4cm = 1km You can measure the distance in cm Try to be exact! (Each extra mm = .1) Then … divide by 4 to change to km

  8. Quick recap Convert these scales Scale 2cm = 1 km • 2cm • 4cm • 6cm • 7cm • 5cm • Scale 4cm = 1 km • 4cm • 2cm • 6cm • 7cm • 5cm

  9. Quick recap Answers • Scale 2cm = 1 km • 1km • 2km • 3km • 3.5km • 2.5km • Scale 4cm = 1 km • 1km • 0.5 km • 1.5km • 1.75 km • 1.25 km

  10. How do we measure something that isn’t straight? Things like roads and rivers are bendy, but our ruler is straight… How can we measure them?

  11. How do we measure something that isn’t straight? Step forward our hero

  12. Activity We are going to measure the distances between points on your map using the ‘magic strip’ technique we have just watched You need:-Your ruler-Pencil-Your ‘Magic strip’

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