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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 814 · 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.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
  2. 2.⚖️ 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
  3. 3.True or false: orange juice is an acid. (a) True (b) False
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  5. 5.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  6. 6.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  7. 7.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) tamarind water (d) plain water
  8. 8.True or false: vinegar is an acid. (a) False (b) True
  9. 9.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  10. 10.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) plain water (d) sugar water
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  13. 13.🛟 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
  14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
  15. 15.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  16. 16.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  17. 17.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) orange juice (d) baking soda water
  18. 18.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) sugar water (d) vinegar
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) turmeric powder (c) water (d) white paper strips
  21. 21.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  22. 22.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  23. 23.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) salt water (d) baking soda water
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) a dropper or spoon (d) lemon juice
  25. 25.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a battery cell
  27. 27.True or false: salt water keeps turmeric yellow. (a) True (b) False
  28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  29. 29.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) curd (d) plain water
  30. 30.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  31. 31.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) baking soda water (c) tamarind water (d) salt water
  33. 33.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
  34. 34.🫧 Which of these is a base? (a) vinegar (b) salt water (c) lemon juice (d) soap solution
  35. 35.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
  36. 36.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  38. 38.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  39. 39.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  40. 40.True or false: soap solution keeps turmeric yellow. (a) False (b) True

Answer key

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

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