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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 410 · 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.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) water (d) lemon juice
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
  5. 5.⚖️ 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
  6. 6.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  7. 7.🔮 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
  8. 8.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  9. 9.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  10. 10.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.⚖️ 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
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the liquid we test
  13. 13.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.True or false: vinegar is neutral. (a) False (b) True
  15. 15.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  16. 16.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  17. 17.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a comb (d) white paper strips
  19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  20. 20.🫧 Which of these is neutral? (a) orange juice (b) salt water (c) baking soda water (d) tamarind water
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  22. 22.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  23. 23.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) a comb (d) a balloon
  24. 24.🫧 Which of these is neutral? (a) lemon juice (b) sugar water (c) detergent water (d) baking soda water
  25. 25.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  26. 26.🫧 Which of these is neutral? (a) detergent water (b) curd (c) plain water (d) vinegar
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) lemon juice (d) a battery cell
  28. 28.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) lemon juice (d) salt water
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the colour we see (d) the turmeric paper
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) lemon juice (d) soap solution
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
  32. 32.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) reddish (d) green
  33. 33.True or false: sugar water is a base. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) lemon juice (d) salt water
  35. 35.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) water (d) white paper strips
  37. 37.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  38. 38.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  39. 39.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a comb (b) soap solution (c) a balloon (d) yeast

Answer key

  1. turns reddish-brown
  2. yeast
  3. True
  4. plain water
  5. we keep it the same
  6. a base
  7. it stays yellow
  8. needed
  9. an acid
  10. neutral
  11. we measure it
  12. the liquid we test
  13. stays yellow
  14. False
  15. use only kitchen items
  16. False
  17. True
  18. white paper strips
  19. soap solution
  20. salt water
  21. True
  22. needed
  23. a dropper or spoon
  24. sugar water
  25. False
  26. plain water
  27. a battery cell
  28. soap solution
  29. the colour we see
  30. soap solution
  31. vinegar
  32. reddish
  33. False
  34. detergent water
  35. False
  36. a balloon
  37. salt water
  38. True
  39. a base
  40. soap solution

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