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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 55 · 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.True or false: orange juice is neutral. (a) False (b) True
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) soap solution (c) tamarind water (d) plain water
  3. 3.⚖️ 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
  4. 4.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the colour we see (c) the turmeric paper (d) the liquid we test
  6. 6.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  7. 7.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  8. 8.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) tamarind water (d) detergent water
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) soap solution (d) lemon juice
  12. 12.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) white paper strips (d) a dropper or spoon
  14. 14.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  16. 16.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  18. 18.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  21. 21.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) a mirror (d) a comb
  22. 22.🫧 Which of these is neutral? (a) salt water (b) orange juice (c) curd (d) vinegar
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  24. 24.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a comb (d) turmeric powder
  26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.True or false: tamarind water is an acid. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) soap solution (d) a mirror
  30. 30.True or false: curd is a base. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) water (d) a balloon
  32. 32.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) a balloon (d) lemon juice
  33. 33.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  34. 34.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
  36. 36.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  37. 37.True or false: sugar water is an acid. (a) True (b) False
  38. 38.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  39. 39.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True

Answer key

  1. False
  2. soap solution
  3. we keep it the same
  4. True
  5. the liquid we test
  6. it stays yellow
  7. not needed
  8. neutral
  9. True
  10. detergent water
  11. a balloon
  12. soap water is a base
  13. a battery cell
  14. True
  15. needed
  16. False
  17. False
  18. stays yellow
  19. reddish-brown
  20. False
  21. turmeric powder
  22. salt water
  23. False
  24. a base
  25. a comb
  26. turns reddish-brown
  27. True
  28. False
  29. soap solution
  30. False
  31. a balloon
  32. lemon juice
  33. vinegar
  34. stays yellow
  35. an old shirt or apron
  36. use only kitchen items
  37. False
  38. True
  39. needed
  40. False

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