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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 101 · 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: salt water turns turmeric reddish-brown. (a) False (b) True
  2. 2.True or false: lemon juice is an acid. (a) True (b) False
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) soap solution (d) lemon juice
  4. 4.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) soap solution (d) water
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) turmeric powder (d) a battery cell
  7. 7.⚖️ 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 measure it (c) we change it
  8. 8.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
  10. 10.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) white paper strips (d) yeast
  12. 12.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  13. 13.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  14. 14.True or false: soap solution is a base. (a) False (b) True
  15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  16. 16.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
  17. 17.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  18. 18.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) soap solution (d) a mirror
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  25. 25.🫧 Which of these is an acid? (a) baking soda water (b) curd (c) salt water (d) detergent water
  26. 26.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  27. 27.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a mirror (c) a magnet (d) a battery cell
  28. 28.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  29. 29.True or false: orange juice is an acid. (a) False (b) True
  30. 30.True or false: salt water keeps turmeric yellow. (a) True (b) False
  31. 31.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) water (c) a dropper or spoon (d) soap solution
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  35. 35.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  36. 36.🫧 Which of these is a base? (a) orange juice (b) soap solution (c) salt water (d) curd
  37. 37.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  39. 39.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish

Answer key

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

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