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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 628 · 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: baking soda water is a base. (a) False (b) True
  2. 2.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  3. 3.⚖️ 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 change it (c) we measure it
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a magnet (d) turmeric powder
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) lemon juice (d) a comb
  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.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) green (d) reddish-brown
  8. 8.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  9. 9.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
  11. 11.True or false: a comb is needed for the turmeric test. (a) False (b) True
  12. 12.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a battery cell (d) a mirror
  13. 13.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
  14. 14.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  15. 15.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  16. 16.⚖️ 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 turmeric paper (c) the number of drops (d) the liquid we test
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  18. 18.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  19. 19.🛟 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
  20. 20.True or false: salt water keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  22. 22.⚖️ 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
  23. 23.True or false: yeast is needed for the turmeric test. (a) True (b) False
  24. 24.True or false: detergent water is an acid. (a) False (b) True
  25. 25.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  28. 28.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  29. 29.🫧 Which of these is a base? (a) soap solution (b) salt water (c) lemon juice (d) sugar water
  30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  31. 31.True or false: orange juice is an acid. (a) False (b) True
  32. 32.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  33. 33.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  36. 36.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) plain water (d) salt water
  37. 37.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) white paper strips (d) a magnet
  38. 38.⚖️ 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
  39. 39.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) lemon juice (d) a comb

Answer key

  1. True
  2. an acid
  3. we keep it the same
  4. a magnet
  5. a comb
  6. False
  7. reddish-brown
  8. use only kitchen items
  9. an acid
  10. reddish
  11. False
  12. turmeric powder
  13. sugar water
  14. False
  15. soap water is a base
  16. the liquid we test
  17. False
  18. needed
  19. an old shirt or apron
  20. True
  21. True
  22. we change it
  23. False
  24. False
  25. stays yellow
  26. needed
  27. not needed
  28. True
  29. soap solution
  30. it stays yellow
  31. True
  32. needed
  33. True
  34. True
  35. it stays yellow
  36. detergent water
  37. white paper strips
  38. we keep it the same
  39. reddish-brown
  40. a comb

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