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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 730 · 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.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) vinegar
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) a pulley (d) an indicator
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  4. 4.🫧 Which of these is neutral? (a) detergent water (b) tamarind water (c) orange juice (d) plain water
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  6. 6.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  7. 7.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) water (d) a balloon
  9. 9.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  10. 10.🫧 Which of these is a base? (a) curd (b) vinegar (c) detergent water (d) plain water
  11. 11.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  12. 12.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  14. 14.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  15. 15.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  16. 16.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  17. 17.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
  18. 18.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) a dropper or spoon (d) lemon juice
  20. 20.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
  21. 21.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  22. 22.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) green (d) bright blue
  23. 23.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a mirror (c) a balloon (d) a battery cell
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) a balloon (d) white paper strips
  25. 25.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) baking soda water (d) soap solution
  26. 26.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) water (d) soap solution
  29. 29.🫧 Which of these is an acid? (a) vinegar (b) detergent water (c) soap solution (d) baking soda water
  30. 30.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  31. 31.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  32. 32.True or false: plain water is a base. (a) False (b) True
  33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
  34. 34.True or false: tamarind water is a base. (a) False (b) True
  35. 35.🟡 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
  36. 36.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  38. 38.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  39. 39.True or false: plain water is neutral. (a) True (b) False
  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 measure it (c) we change it

Answer key

  1. soap solution
  2. an indicator
  3. True
  4. plain water
  5. an old shirt or apron
  6. False
  7. turns reddish-brown
  8. a balloon
  9. True
  10. detergent water
  11. needed
  12. soap solution
  13. we keep it the same
  14. False
  15. needed
  16. vinegar
  17. sugar water
  18. tamarind water
  19. a battery cell
  20. reddish-brown
  21. needed
  22. reddish-brown
  23. lemon juice
  24. a balloon
  25. tamarind water
  26. stays yellow
  27. use only kitchen items
  28. a battery cell
  29. vinegar
  30. True
  31. False
  32. False
  33. reddish
  34. False
  35. soap water is a base
  36. plain water
  37. we keep it the same
  38. False
  39. True
  40. we change it

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