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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 182 · 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.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is magnetic (d) soap is hot
  2. 2.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  3. 3.⚖️ 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
  4. 4.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  5. 5.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  6. 6.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
  10. 10.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  11. 11.True or false: lemon juice is an acid. (a) False (b) True
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  14. 14.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  15. 15.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a balloon (d) soap solution
  17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) soap solution (d) vinegar
  20. 20.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a battery cell
  21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) soap solution (d) lemon juice
  24. 24.⚖️ 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
  25. 25.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  26. 26.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) a dropper or spoon (c) water (d) soap solution
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  29. 29.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) a dropper or spoon (d) a balloon
  32. 32.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  33. 33.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  34. 34.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  35. 35.True or false: soap solution is a base. (a) False (b) True
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  37. 37.🫧 Which of these is neutral? (a) soap solution (b) tamarind water (c) curd (d) salt water
  38. 38.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  39. 39.True or false: plain water is an acid. (a) False (b) True
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron

Answer key

  1. soap water is a base
  2. False
  3. the colour we see
  4. True
  5. False
  6. turns reddish-brown
  7. True
  8. it stays yellow
  9. the number of drops
  10. needed
  11. True
  12. use only kitchen items
  13. False
  14. True
  15. soap solution
  16. soap solution
  17. stays yellow
  18. a base
  19. soap solution
  20. a battery cell
  21. reddish-brown
  22. we measure it
  23. a magnet
  24. we change it
  25. True
  26. reddish
  27. a mirror
  28. we keep it the same
  29. False
  30. False
  31. a balloon
  32. False
  33. not needed
  34. not needed
  35. True
  36. True
  37. salt water
  38. True
  39. False
  40. an old shirt or apron

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