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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 332 · 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 magnet for the turmeric test? (a) needed (b) not needed
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  4. 4.True or false: plain water is a base. (a) False (b) True
  5. 5.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  6. 6.🫧 Which of these is a base? (a) tamarind water (b) vinegar (c) curd (d) detergent water
  7. 7.True or false: a comb is needed for the turmeric test. (a) False (b) True
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  9. 9.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  10. 10.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  14. 14.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  15. 15.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  16. 16.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  17. 17.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  18. 18.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) soap solution (d) lemon juice
  20. 20.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
  21. 21.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  22. 22.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  24. 24.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the light we look in (d) the colour we see
  26. 26.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
  27. 27.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
  29. 29.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
  30. 30.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  33. 33.True or false: salt water is an acid. (a) False (b) True
  34. 34.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) soap solution (d) plain water
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) lemon juice (d) a dropper or spoon
  36. 36.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  37. 37.True or false: sugar water is a base. (a) True (b) False
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) a magnet (d) a battery cell
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) a balloon (d) white paper strips
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it

Answer key

  1. not needed
  2. reddish-brown
  3. False
  4. False
  5. lemon juice
  6. detergent water
  7. False
  8. the number of drops
  9. True
  10. stays yellow
  11. needed
  12. True
  13. we keep it the same
  14. True
  15. False
  16. True
  17. use only kitchen items
  18. True
  19. soap solution
  20. vinegar
  21. False
  22. False
  23. soap solution
  24. turns reddish-brown
  25. the colour we see
  26. reddish
  27. False
  28. the liquid we test
  29. an old shirt or apron
  30. False
  31. stays yellow
  32. not needed
  33. False
  34. plain water
  35. a magnet
  36. neutral
  37. False
  38. water
  39. a balloon
  40. we keep it the same

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