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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 835 · 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.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) lemon juice (d) a dropper or spoon
  4. 4.True or false: salt water is a base. (a) False (b) True
  5. 5.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  6. 6.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  7. 7.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) a dropper or spoon (d) a comb
  8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) an indicator (d) a prism
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  10. 10.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) salt water (d) baking soda water
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  14. 14.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) curd (d) vinegar
  16. 16.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) curd (d) salt water
  17. 17.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) tamarind water (d) plain water
  18. 18.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) a balloon (d) water
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
  21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) a dropper or spoon (d) white paper strips
  23. 23.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) white paper strips (d) turmeric powder
  25. 25.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  26. 26.True or false: plain water is neutral. (a) True (b) False
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  28. 28.True or false: lemon juice is an acid. (a) False (b) True
  29. 29.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  30. 30.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  31. 31.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  32. 32.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
  34. 34.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) a balloon (d) white paper strips
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) white paper strips (d) a battery cell
  37. 37.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
  38. 38.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
  40. 40.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid

Answer key

  1. needed
  2. reddish-brown
  3. a comb
  4. False
  5. True
  6. an acid
  7. a comb
  8. an indicator
  9. False
  10. salt water
  11. True
  12. we measure it
  13. we keep it the same
  14. turns reddish-brown
  15. baking soda water
  16. curd
  17. soap solution
  18. a balloon
  19. we keep it the same
  20. soap solution
  21. reddish
  22. a magnet
  23. True
  24. a magnet
  25. True
  26. True
  27. False
  28. True
  29. True
  30. False
  31. True
  32. an acid
  33. the turmeric paper
  34. stays yellow
  35. a balloon
  36. a battery cell
  37. vinegar
  38. True
  39. salt water
  40. a base

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