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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 179 · 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: yeast is not needed for the turmeric test. (a) False (b) True
  2. 2.True or false: curd is an acid. (a) False (b) True
  3. 3.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  4. 4.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) water (d) a magnet
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) water (d) soap solution
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
  10. 10.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  11. 11.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
  13. 13.True or false: vinegar is neutral. (a) False (b) True
  14. 14.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) turmeric powder (d) a mirror
  15. 15.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a battery cell (c) a dropper or spoon (d) soap solution
  17. 17.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  18. 18.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  19. 19.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
  20. 20.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) baking soda water (d) detergent water
  21. 21.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) a mirror (d) a balloon
  22. 22.True or false: orange juice is neutral. (a) True (b) False
  23. 23.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  24. 24.⚖️ 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
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  26. 26.🫧 Which of these is neutral? (a) sugar water (b) vinegar (c) lemon juice (d) curd
  27. 27.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
  28. 28.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) a dropper or spoon (d) a magnet
  30. 30.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) baking soda water (d) plain water
  31. 31.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  32. 32.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  33. 33.⚖️ 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
  34. 34.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  36. 36.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  37. 37.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the light we look in
  39. 39.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.True or false: a magnet is needed for the turmeric test. (a) True (b) False

Answer key

  1. True
  2. True
  3. True
  4. use only kitchen items
  5. it stays yellow
  6. reddish
  7. a magnet
  8. a balloon
  9. the light we look in
  10. stays yellow
  11. stays yellow
  12. an old shirt or apron
  13. False
  14. turmeric powder
  15. True
  16. a battery cell
  17. True
  18. needed
  19. vinegar
  20. salt water
  21. a dropper or spoon
  22. False
  23. needed
  24. we change it
  25. False
  26. sugar water
  27. reddish-brown
  28. sugar water
  29. a magnet
  30. baking soda water
  31. a base
  32. False
  33. we keep it the same
  34. stays yellow
  35. stays yellow
  36. True
  37. False
  38. the colour we see
  39. an acid
  40. False

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