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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 398 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  2. 2.True or false: plain water keeps turmeric yellow. (a) False (b) True
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
  4. 4.🔮 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
  5. 5.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  6. 6.True or false: water is not needed for the turmeric test. (a) False (b) True
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a comb (d) turmeric powder
  8. 8.True or false: lemon juice is a base. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  10. 10.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) yeast
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  14. 14.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  16. 16.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  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.True or false: salt water is an acid. (a) True (b) False
  19. 19.🫧 Which of these is an acid? (a) sugar water (b) curd (c) baking soda water (d) soap solution
  20. 20.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  22. 22.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) tamarind water (d) sugar water
  23. 23.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  24. 24.True or false: water is needed for the turmeric test. (a) True (b) False
  25. 25.⚖️ 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
  26. 26.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a magnet (c) water (d) lemon juice
  28. 28.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
  29. 29.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
  30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
  31. 31.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  32. 32.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  35. 35.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  36. 36.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) tamarind water (d) salt water
  38. 38.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) detergent water (d) plain water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it

Answer key

  1. True
  2. True
  3. the liquid we test
  4. reddish-brown
  5. it stays yellow
  6. False
  7. a comb
  8. False
  9. False
  10. False
  11. yeast
  12. False
  13. not needed
  14. stays yellow
  15. True
  16. use only kitchen items
  17. True
  18. False
  19. curd
  20. stays yellow
  21. not needed
  22. detergent water
  23. True
  24. True
  25. False
  26. False
  27. a magnet
  28. it stays yellow
  29. reddish-brown
  30. it turns yellow again
  31. an acid
  32. stays yellow
  33. a base
  34. needed
  35. True
  36. vinegar
  37. soap solution
  38. reddish
  39. detergent water
  40. we measure it

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