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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 437 · 40 questions
TalentJR

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

NameDateTime takenScore ___ / 40
  1. 1.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) tamarind water (d) baking soda water
  3. 3.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  4. 4.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  6. 6.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) a battery cell
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
  11. 11.True or false: vinegar is an acid. (a) False (b) True
  12. 12.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  13. 13.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  14. 14.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  18. 18.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  19. 19.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  20. 20.True or false: sugar water is neutral. (a) False (b) True
  21. 21.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  22. 22.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a magnet (c) yeast (d) a battery cell
  23. 23.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  24. 24.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  25. 25.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  26. 26.True or false: tamarind water is an acid. (a) True (b) False
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  28. 28.True or false: vinegar is a base. (a) False (b) True
  29. 29.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) baking soda water (d) plain water
  30. 30.True or false: soap solution is neutral. (a) False (b) True
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  32. 32.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the turmeric paper (d) the number of drops
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) vinegar (d) salt water
  36. 36.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) baking soda water
  37. 37.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) turmeric powder (d) lemon juice
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it

Answer key

  1. turns reddish-brown
  2. baking soda water
  3. True
  4. not needed
  5. True
  6. an acid
  7. True
  8. a battery cell
  9. use only kitchen items
  10. the light we look in
  11. True
  12. False
  13. False
  14. True
  15. True
  16. reddish
  17. we measure it
  18. False
  19. False
  20. True
  21. False
  22. lemon juice
  23. True
  24. not needed
  25. True
  26. True
  27. the turmeric paper
  28. False
  29. baking soda water
  30. False
  31. we keep it the same
  32. not needed
  33. the colour we see
  34. False
  35. detergent water
  36. baking soda water
  37. False
  38. we keep it the same
  39. a magnet
  40. we change it

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