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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 78 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.True or false: lemon juice is a base. (a) False (b) True
  6. 6.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  8. 8.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) white paper strips (d) a dropper or spoon
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  11. 11.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) yeast (d) white paper strips
  15. 15.True or false: sugar water is neutral. (a) False (b) True
  16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  17. 17.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the colour we see (d) the liquid we test
  20. 20.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  21. 21.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
  22. 22.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  23. 23.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  24. 24.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  25. 25.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) salt water (c) baking soda water (d) soap solution
  26. 26.⚖️ 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
  27. 27.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a balloon (d) water
  29. 29.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) soap solution (d) plain water
  31. 31.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) water (d) a mirror
  33. 33.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  34. 34.True or false: plain water is an acid. (a) False (b) True
  35. 35.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  36. 36.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  37. 37.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  38. 38.🫧 Which of these is a base? (a) lemon juice (b) plain water (c) salt water (d) baking soda water
  39. 39.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  40. 40.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed

Answer key

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

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