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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 491 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
  2. 2.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) lemon juice (d) curd
  3. 3.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
  6. 6.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) lemon juice (d) yeast
  7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a dropper or spoon (d) a balloon
  9. 9.True or false: tamarind water is an acid. (a) True (b) False
  10. 10.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) soap solution (d) lemon juice
  11. 11.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  12. 12.⚖️ 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
  13. 13.True or false: lemon juice is a base. (a) False (b) True
  14. 14.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  17. 17.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  18. 18.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  19. 19.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  21. 21.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  22. 22.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  23. 23.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) water (d) white paper strips
  26. 26.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  27. 27.True or false: soap solution is an acid. (a) True (b) False
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) lemon juice (d) white paper strips
  29. 29.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  31. 31.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
  32. 32.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  33. 33.True or false: orange juice is an acid. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) turmeric powder (d) water
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) turmeric powder (d) a battery cell
  36. 36.⚖️ 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
  37. 37.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
  39. 39.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  40. 40.True or false: plain water turns turmeric reddish-brown. (a) True (b) False

Answer key

  1. the liquid we test
  2. detergent water
  3. True
  4. the light we look in
  5. the colour we see
  6. lemon juice
  7. reddish-brown
  8. a balloon
  9. True
  10. soap solution
  11. False
  12. we keep it the same
  13. False
  14. True
  15. turns reddish-brown
  16. needed
  17. True
  18. False
  19. stays yellow
  20. the number of drops
  21. stays yellow
  22. an acid
  23. not needed
  24. True
  25. a comb
  26. needed
  27. False
  28. a magnet
  29. False
  30. False
  31. use only kitchen items
  32. True
  33. True
  34. a magnet
  35. turmeric powder
  36. we measure it
  37. soap water is a base
  38. the turmeric paper
  39. a base
  40. False

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