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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 927 · 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.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) a prism (d) an indicator
  2. 2.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) sugar water (d) soap solution
  3. 3.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  4. 4.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) water (d) a comb
  7. 7.🫧 Which of these is neutral? (a) soap solution (b) vinegar (c) plain water (d) tamarind water
  8. 8.True or false: lemon juice is an acid. (a) False (b) True
  9. 9.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a dropper or spoon (d) a balloon
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) salt water (d) lemon juice
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  14. 14.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  15. 15.True or false: tamarind water is neutral. (a) False (b) True
  16. 16.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  18. 18.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  19. 19.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) water (c) lemon juice (d) turmeric powder
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) a battery cell
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) detergent water (c) vinegar (d) salt water
  24. 24.🫧 Which of these is a base? (a) tamarind water (b) vinegar (c) orange juice (d) baking soda water
  25. 25.True or false: curd is an acid. (a) True (b) False
  26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  29. 29.🔍 Which is the odd one out? (a) tamarind water (b) lemon juice (c) baking soda water (d) sugar water
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) detergent water (d) tamarind water
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  33. 33.True or false: lemon juice is a base. (a) False (b) True
  34. 34.⚖️ 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
  35. 35.🫧 Which of these is an acid? (a) detergent water (b) curd (c) sugar water (d) baking soda water
  36. 36.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) salt water
  37. 37.True or false: curd is a base. (a) True (b) False
  38. 38.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  39. 39.🫧 Which of these is a base? (a) salt water (b) lemon juice (c) orange juice (d) soap solution
  40. 40.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water

Answer key

  1. an indicator
  2. soap solution
  3. not needed
  4. lemon juice
  5. it stays yellow
  6. a comb
  7. plain water
  8. True
  9. True
  10. a balloon
  11. soap solution
  12. reddish-brown
  13. we change it
  14. needed
  15. False
  16. False
  17. we measure it
  18. True
  19. a comb
  20. a battery cell
  21. False
  22. turns reddish-brown
  23. detergent water
  24. baking soda water
  25. True
  26. turns reddish-brown
  27. a base
  28. an acid
  29. baking soda water
  30. we keep it the same
  31. detergent water
  32. True
  33. False
  34. we keep it the same
  35. curd
  36. salt water
  37. False
  38. use only kitchen items
  39. soap solution
  40. tamarind water

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