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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 146 · 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 turns turmeric reddish-brown? (a) sugar water (b) detergent water (c) vinegar (d) tamarind water
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) yeast (d) water
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
  4. 4.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
  5. 5.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) sugar water (d) salt water
  7. 7.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) baking soda water (d) vinegar
  8. 8.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  9. 9.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) a battery cell
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  12. 12.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  13. 13.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) detergent water (d) soap solution
  14. 14.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  15. 15.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.⚖️ 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 light we look in (d) the liquid we test
  17. 17.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  18. 18.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) salt water (c) sugar water (d) vinegar
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) white paper strips (c) yeast (d) a magnet
  20. 20.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  21. 21.True or false: curd is a base. (a) True (b) False
  22. 22.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  24. 24.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) plain water (d) lemon juice
  25. 25.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) curd (d) sugar water
  26. 26.True or false: sugar water is neutral. (a) True (b) False
  27. 27.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  29. 29.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) lemon juice (d) a comb
  30. 30.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) detergent water (d) orange juice
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) a battery cell (d) lemon juice
  32. 32.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  34. 34.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) white paper strips (d) a magnet
  38. 38.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
  39. 39.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) vinegar (d) plain water
  40. 40.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again

Answer key

  1. detergent water
  2. yeast
  3. use only kitchen items
  4. lemon juice
  5. False
  6. soap solution
  7. baking soda water
  8. False
  9. needed
  10. a battery cell
  11. reddish-brown
  12. neutral
  13. tamarind water
  14. False
  15. stays yellow
  16. the liquid we test
  17. an indicator
  18. soap solution
  19. white paper strips
  20. reddish-brown
  21. False
  22. turns reddish-brown
  23. True
  24. plain water
  25. sugar water
  26. True
  27. stays yellow
  28. True
  29. lemon juice
  30. orange juice
  31. a battery cell
  32. plain water
  33. True
  34. needed
  35. True
  36. soap water is a base
  37. a magnet
  38. vinegar
  39. vinegar
  40. it turns yellow again

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