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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 41 · 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.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  2. 2.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  3. 3.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  5. 5.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  6. 6.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) a dropper or spoon (d) lemon juice
  8. 8.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the colour we see (c) the number of drops (d) the liquid we test
  11. 11.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  13. 13.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  14. 14.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
  15. 15.True or false: curd is an acid. (a) False (b) True
  16. 16.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) a dropper or spoon (d) a battery cell
  18. 18.🔮 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
  19. 19.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  20. 20.True or false: salt water keeps turmeric yellow. (a) True (b) False
  21. 21.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  22. 22.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) turmeric powder (d) a battery cell
  24. 24.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  25. 25.True or false: water is not needed for the turmeric test. (a) False (b) True
  26. 26.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.True or false: orange juice is an acid. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  29. 29.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) lemon juice (d) vinegar
  30. 30.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  31. 31.True or false: curd is neutral. (a) False (b) True
  32. 32.🫧 Which of these is an acid? (a) salt water (b) vinegar (c) plain water (d) sugar water
  33. 33.True or false: salt water is an acid. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
  36. 36.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  38. 38.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) plain water (d) curd
  39. 39.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True

Answer key

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

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