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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 763 · 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: detergent water is an acid. (a) False (b) True
  2. 2.True or false: vinegar is a base. (a) True (b) False
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) lemon juice (d) tamarind water
  4. 4.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) lemon juice (d) a comb
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the number of drops (d) the liquid we test
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) white paper strips (d) turmeric powder
  9. 9.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  10. 10.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is hot (d) soap is magnetic
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  12. 12.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  13. 13.True or false: salt water is a base. (a) False (b) True
  14. 14.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  15. 15.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a battery cell (d) lemon juice
  17. 17.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  18. 18.⚖️ 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
  19. 19.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) water (d) yeast
  21. 21.True or false: plain water is a base. (a) True (b) False
  22. 22.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  24. 24.True or false: water is needed for the turmeric test. (a) False (b) True
  25. 25.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the light we look in
  28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  29. 29.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  30. 30.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  31. 31.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  33. 33.True or false: vinegar is neutral. (a) True (b) False
  34. 34.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) a dropper or spoon (d) a balloon
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) turmeric powder (d) yeast
  38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) tamarind water (d) baking soda water
  40. 40.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False

Answer key

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

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