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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 740 · 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: lemon juice turns turmeric reddish-brown. (a) False (b) True
  2. 2.🫧 Which of these is an acid? (a) baking soda water (b) salt water (c) tamarind water (d) sugar water
  3. 3.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
  4. 4.⚖️ 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
  5. 5.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  6. 6.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  7. 7.True or false: curd is neutral. (a) False (b) True
  8. 8.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the number of drops (d) the colour we see
  10. 10.True or false: lemon juice is neutral. (a) True (b) False
  11. 11.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  12. 12.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  13. 13.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) tamarind water
  14. 14.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  15. 15.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a mirror (d) lemon juice
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  18. 18.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  20. 20.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) baking soda water (d) curd
  21. 21.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
  23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  24. 24.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the turmeric paper (d) the colour we see
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) vinegar (c) lemon juice (d) salt water
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  29. 29.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
  31. 31.True or false: salt water is neutral. (a) True (b) False
  32. 32.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  34. 34.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  35. 35.🫧 Which of these is a base? (a) orange juice (b) baking soda water (c) vinegar (d) tamarind water
  36. 36.True or false: plain water is a base. (a) True (b) False
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  39. 39.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test

Answer key

  1. False
  2. tamarind water
  3. lemon juice
  4. we keep it the same
  5. not needed
  6. True
  7. False
  8. False
  9. the colour we see
  10. False
  11. True
  12. a base
  13. tamarind water
  14. False
  15. stays yellow
  16. a mirror
  17. True
  18. not needed
  19. we change it
  20. curd
  21. False
  22. the light we look in
  23. reddish
  24. it stays yellow
  25. the liquid we test
  26. detergent water
  27. False
  28. False
  29. True
  30. reddish-brown
  31. True
  32. True
  33. we keep it the same
  34. an old shirt or apron
  35. baking soda water
  36. False
  37. plain water
  38. False
  39. vinegar
  40. the turmeric paper

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