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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 534 · 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.🫧 Which of these is an acid? (a) orange juice (b) baking soda water (c) sugar water (d) plain water
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) baking soda water (c) lemon juice (d) vinegar
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) water (d) a battery cell
  6. 6.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
  7. 7.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  8. 8.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  9. 9.⚖️ 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 turmeric paper (d) the light we look in
  10. 10.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  11. 11.🔍 Which is the odd one out? (a) plain water (b) salt water (c) vinegar (d) detergent water
  12. 12.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  13. 13.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  15. 15.True or false: lemon juice is neutral. (a) True (b) False
  16. 16.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  17. 17.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  18. 18.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  19. 19.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  20. 20.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
  21. 21.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  22. 22.True or false: sugar water is neutral. (a) False (b) True
  23. 23.⚖️ 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 keep it the same (c) we change it
  24. 24.🫧 Which of these is an acid? (a) detergent water (b) vinegar (c) salt water (d) plain water
  25. 25.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) water (b) a balloon (c) white paper strips (d) lemon juice
  27. 27.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  28. 28.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  29. 29.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  30. 30.⚖️ 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
  31. 31.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  32. 32.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
  34. 34.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a magnet (d) turmeric powder
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
  39. 39.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
  40. 40.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed

Answer key

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

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