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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 45 · 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: lemon juice is neutral. (a) False (b) True
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) baking soda water (d) tamarind water
  3. 3.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
  5. 5.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  7. 7.🫧 Which of these is neutral? (a) salt water (b) curd (c) soap solution (d) baking soda water
  8. 8.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) baking soda water (d) vinegar
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) turmeric powder (d) a battery cell
  11. 11.True or false: vinegar is a base. (a) False (b) True
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  13. 13.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  14. 14.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) lemon juice (d) plain water
  15. 15.⚖️ 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 measure it (c) we keep it the same
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) plain water (d) detergent water
  17. 17.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) white paper strips (d) water
  19. 19.True or false: lemon juice is a base. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) sugar water
  21. 21.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  22. 22.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
  23. 23.True or false: tamarind water is an acid. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) lemon juice (d) a mirror
  27. 27.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) yeast (c) water (d) white paper strips
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) turmeric powder (d) a mirror
  30. 30.True or false: baking soda water is an acid. (a) False (b) True
  31. 31.True or false: salt water keeps turmeric yellow. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
  33. 33.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) yeast (d) water
  34. 34.🫧 Which of these is an acid? (a) plain water (b) salt water (c) vinegar (d) detergent water
  35. 35.True or false: tamarind water is a base. (a) False (b) True
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the light we look in (d) the liquid we test
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a comb (c) water (d) soap solution
  38. 38.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  39. 39.True or false: salt water is an acid. (a) False (b) True
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same

Answer key

  1. False
  2. baking soda water
  3. stays yellow
  4. soap solution
  5. an indicator
  6. False
  7. salt water
  8. baking soda water
  9. use only kitchen items
  10. a battery cell
  11. False
  12. we measure it
  13. needed
  14. lemon juice
  15. we keep it the same
  16. detergent water
  17. needed
  18. a comb
  19. False
  20. detergent water
  21. True
  22. it stays yellow
  23. True
  24. the light we look in
  25. reddish
  26. a mirror
  27. soap water is a base
  28. yeast
  29. turmeric powder
  30. False
  31. True
  32. plain water
  33. water
  34. vinegar
  35. False
  36. the colour we see
  37. a comb
  38. stays yellow
  39. False
  40. we keep it the same

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