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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 648 · 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 sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  2. 2.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  3. 3.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  4. 4.True or false: a comb is needed for the turmeric test. (a) False (b) True
  5. 5.True or false: vinegar is an acid. (a) False (b) True
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
  7. 7.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
  9. 9.True or false: water is needed for the turmeric test. (a) False (b) True
  10. 10.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  11. 11.🔮 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
  12. 12.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
  14. 14.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  15. 15.🫧 Which of these is a base? (a) orange juice (b) tamarind water (c) plain water (d) baking soda water
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  18. 18.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  19. 19.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  20. 20.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) lemon juice (d) yeast
  21. 21.True or false: detergent water is neutral. (a) True (b) False
  22. 22.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  24. 24.🫧 Which of these is neutral? (a) soap solution (b) curd (c) vinegar (d) plain water
  25. 25.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  26. 26.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  27. 27.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  28. 28.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) white paper strips (d) lemon juice
  30. 30.🫧 Which of these is neutral? (a) sugar water (b) detergent water (c) soap solution (d) vinegar
  31. 31.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  33. 33.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
  35. 35.🔮 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
  36. 36.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  37. 37.🧺 Which of these is needed for the turmeric test? (a) yeast (b) white paper strips (c) a battery cell (d) a mirror
  38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  39. 39.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  40. 40.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a balloon (c) water (d) turmeric powder

Answer key

  1. stays yellow
  2. needed
  3. an acid
  4. False
  5. True
  6. the colour we see
  7. False
  8. an old shirt or apron
  9. True
  10. not needed
  11. it stays yellow
  12. True
  13. the light we look in
  14. neutral
  15. baking soda water
  16. True
  17. we keep it the same
  18. True
  19. a base
  20. yeast
  21. False
  22. not needed
  23. False
  24. plain water
  25. False
  26. False
  27. use only kitchen items
  28. stays yellow
  29. a mirror
  30. sugar water
  31. plain water
  32. True
  33. False
  34. soap water is a base
  35. reddish
  36. an acid
  37. white paper strips
  38. reddish-brown
  39. True
  40. a balloon

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