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After this lesson : You can name the 5 senses off the top of your head

NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT . Les 3 / 10. After this lesson : You can name the 5 senses off the top of your head. NASK – WAARNEMEN VS METEN. Senses. Eyes ( seeing ) Ears ( hearing) Nose ( smelling ) Mouth ( tasting ) Skin (feeling) inaccurate!!.

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After this lesson : You can name the 5 senses off the top of your head

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  1. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Afterthislesson: Youcan name the 5 senses off the top of yourhead

  2. NASK – WAARNEMEN VS METEN Senses Eyes(seeing) Ears (hearing) Nose(smelling) Mouth(tasting) Skin (feeling) inaccurate!!

  3. NASK – OBSERVATION VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Oureyescanbefooled Stare at the middle of the disc

  4. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Oureyescanbefooled This is NOT a video!!

  5. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Oureyescanbefooled All the brownsections in this picture are equallybrown

  6. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Andour skin? Canyou, forexample, feel withyour skin ifsomething is hot or cold? What does the coldwater tap feel likeafter a hot shower? Andwhat does the samecoldwater tap feel likeaftercycling in the winter? Is the temperature different then?

  7. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Can we measure time? How manyseconds does it take before the traffic lights turn green? start 8 seconds

  8. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 We canmeasurethis, forexample, withour body, but notsoaccurately Whichmeasuringinstrumentsdo we useforthis? distance ruler, measuring tape weight scales time stopwatch, clock temperature thermometer But are these instruments accurate?

  9. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 How accurate is a stopwatch? Nowmeasure the time of the traffic lightswith a stopwatch start 6 seconds

  10. NASK – – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 How accurate is a stopwatch? A number of examplemeasurements • Whatcanyou say aboutthis? • All the measurements are wrong • All the measurements are nearly • wrong • 3. The measurements are very • similar • 4. The average is 6.37 5. The writtenvalue is pointless

  11. NASK The writtenvalue is pointless Les 3 / 10 Measuringseems a lot likeshooting at a target The middle is 6 seconds

  12. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Fourarchers A B Who is the winner? C D

  13. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Fourarchers A B Who is the winner? Whowould have won ifonlythe first shot had been fired? Who is betterA or B? Who are we? C D

  14. NASK OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 How accurate is a stopwatch? If I know the correct value, can I reviseit

  15. NASK – OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Exact Accurate Exact Accurate Exact Accurate Exact Accurate C D

  16. NASK OBSERVING VS MEASURING AND UNCERTAINTY OF MEASUREMENT Les 3 / 10 Assignment Using a stopwatch, measure 10 times the time it takes for light A to change colour. Write these measurements down in a table in your notebook. Determine the average of these measurements Determine the level of inaccuracy Nowmeasure 10 times the time that light B takes to change colour. Write these measurements down in a second table. Determine the level of accuracy Correct the averagewith the inaccuracy level of A A B 5 seconds ?? How long does traffic light B take? 6.5 seconds

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