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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 46 · 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: vinegar is neutral. (a) True (b) False
  2. 2.True or false: orange juice is a base. (a) True (b) False
  3. 3.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.True or false: salt water is a base. (a) False (b) True
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) lemon juice (c) a dropper or spoon (d) turmeric powder
  6. 6.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  8. 8.True or false: vinegar is an acid. (a) False (b) True
  9. 9.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a balloon (d) white paper strips
  12. 12.True or false: water is needed for the turmeric test. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  14. 14.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) water (d) a battery cell
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  16. 16.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
  17. 17.🫧 Which of these is neutral? (a) salt water (b) tamarind water (c) detergent water (d) curd
  18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  19. 19.🫧 Which of these is a base? (a) lemon juice (b) detergent water (c) vinegar (d) sugar water
  20. 20.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) soap solution (d) water
  22. 22.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
  23. 23.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) salt water (d) tamarind water
  25. 25.True or false: water is not needed for the turmeric test. (a) True (b) False
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a comb
  27. 27.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) white paper strips (d) a magnet
  29. 29.🔮 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
  30. 30.🧺 Which of these is needed for the turmeric test? (a) yeast (b) lemon juice (c) a magnet (d) a battery cell
  31. 31.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  32. 32.📘 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
  33. 33.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  34. 34.🛟 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
  35. 35.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  36. 36.True or false: lemon juice is an acid. (a) False (b) True
  37. 37.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.True or false: salt water keeps turmeric yellow. (a) True (b) False
  39. 39.🫧 Which of these is neutral? (a) detergent water (b) plain water (c) baking soda water (d) vinegar
  40. 40.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False

Answer key

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

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