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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 7 · 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.

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

Answer key

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

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