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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 60 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.🔮 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
  3. 3.🫧 Which of these is neutral? (a) soap solution (b) vinegar (c) salt water (d) detergent water
  4. 4.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
  5. 5.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  6. 6.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  7. 7.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a comb (d) a battery cell
  8. 8.⚖️ 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
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  10. 10.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the turmeric paper
  12. 12.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  13. 13.⚖️ 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
  14. 14.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  16. 16.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.True or false: baking soda water is neutral. (a) False (b) True
  18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  19. 19.True or false: sugar water is a base. (a) True (b) False
  20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
  23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
  24. 24.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) salt water (d) lemon juice
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a comb (d) white paper strips
  27. 27.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) soap solution (d) a balloon
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) turmeric powder (c) water (d) a dropper or spoon
  30. 30.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  31. 31.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  32. 32.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  33. 33.🫧 Which of these is neutral? (a) detergent water (b) tamarind water (c) plain water (d) vinegar
  34. 34.True or false: salt water is an acid. (a) True (b) False
  35. 35.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.True or false: plain water keeps turmeric yellow. (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 salt water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
  40. 40.True or false: white paper strips is needed for the turmeric test. (a) False (b) True

Answer key

  1. we change it
  2. reddish
  3. salt water
  4. an indicator
  5. lemon juice
  6. needed
  7. turmeric powder
  8. we keep it the same
  9. use only kitchen items
  10. not needed
  11. the colour we see
  12. False
  13. we keep it the same
  14. stays yellow
  15. True
  16. stays yellow
  17. False
  18. it stays yellow
  19. False
  20. stays yellow
  21. False
  22. soap solution
  23. soap solution
  24. stays yellow
  25. lemon juice
  26. a comb
  27. True
  28. a balloon
  29. yeast
  30. True
  31. False
  32. a base
  33. plain water
  34. False
  35. stays yellow
  36. True
  37. False
  38. stays yellow
  39. the turmeric paper
  40. True

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