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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 660 · 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 of these is not needed for the turmeric test? (a) a comb (b) water (c) a dropper or spoon (d) lemon juice
  2. 2.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  3. 3.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  4. 4.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a comb (d) white paper strips
  7. 7.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) curd (d) sugar water
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) soap solution (c) white paper strips (d) turmeric powder
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  11. 11.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  15. 15.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) lemon juice (d) orange juice
  16. 16.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  18. 18.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  19. 19.🫧 Which of these is a base? (a) salt water (b) orange juice (c) soap solution (d) tamarind water
  20. 20.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
  22. 22.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) detergent water (d) salt water
  23. 23.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  24. 24.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is hot (d) soap is an acid
  25. 25.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  26. 26.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  27. 27.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  28. 28.🫧 Which of these is a base? (a) lemon juice (b) baking soda water (c) plain water (d) vinegar
  29. 29.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  30. 30.True or false: lemon juice is an acid. (a) False (b) True
  31. 31.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  32. 32.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) yeast (c) lemon juice (d) turmeric powder
  34. 34.True or false: tamarind water is an acid. (a) True (b) False
  35. 35.True or false: soap solution is an acid. (a) True (b) False
  36. 36.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) a dropper or spoon (d) a mirror
  37. 37.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) turmeric powder (d) yeast
  39. 39.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  40. 40.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) salt water (c) sugar water (d) tamarind water

Answer key

  1. a comb
  2. stays yellow
  3. neutral
  4. plain water
  5. reddish
  6. a comb
  7. curd
  8. False
  9. a battery cell
  10. use only kitchen items
  11. needed
  12. we keep it the same
  13. we keep it the same
  14. True
  15. salt water
  16. stays yellow
  17. True
  18. not needed
  19. soap solution
  20. needed
  21. the colour we see
  22. detergent water
  23. needed
  24. soap water is a base
  25. False
  26. True
  27. it stays yellow
  28. baking soda water
  29. True
  30. True
  31. neutral
  32. not needed
  33. yeast
  34. True
  35. False
  36. a dropper or spoon
  37. True
  38. yeast
  39. False
  40. baking soda water

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