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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 72 · 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.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.True or false: plain water is neutral. (a) False (b) True
  3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  4. 4.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
  6. 6.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) salt water (d) sugar water
  7. 7.🔮 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
  8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) it stays white (d) reddish-brown
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  11. 11.True or false: orange juice is an acid. (a) True (b) False
  12. 12.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  13. 13.⚖️ 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
  14. 14.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) tamarind water (d) detergent water
  15. 15.⚖️ 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
  16. 16.🔮 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
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) lemon juice (d) detergent water
  18. 18.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  19. 19.True or false: baking soda water is neutral. (a) False (b) True
  20. 20.⚖️ 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
  21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  24. 24.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  25. 25.🟡 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
  26. 26.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  27. 27.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  29. 29.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a balloon (d) turmeric powder
  33. 33.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  34. 34.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) white paper strips (d) a balloon
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) turmeric powder (d) lemon juice
  37. 37.True or false: water is not needed for the turmeric test. (a) False (b) True
  38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  39. 39.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  40. 40.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) white paper strips (c) lemon juice (d) turmeric powder

Answer key

  1. stays yellow
  2. True
  3. it stays yellow
  4. tamarind water
  5. an old shirt or apron
  6. soap solution
  7. reddish-brown
  8. reddish-brown
  9. False
  10. use only kitchen items
  11. True
  12. not needed
  13. we change it
  14. tamarind water
  15. False
  16. reddish
  17. detergent water
  18. False
  19. False
  20. we keep it the same
  21. salt water
  22. turns reddish-brown
  23. False
  24. needed
  25. soap water is a base
  26. lemon juice
  27. neutral
  28. True
  29. stays yellow
  30. True
  31. we keep it the same
  32. a balloon
  33. salt water
  34. False
  35. a balloon
  36. a mirror
  37. False
  38. an acid
  39. needed
  40. a battery cell

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