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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 77 · 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.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) salt water (d) curd
  2. 2.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) baking soda water (d) tamarind water
  4. 4.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  5. 5.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  6. 6.True or false: yeast is needed for the turmeric test. (a) True (b) False
  7. 7.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) sugar water (d) soap solution
  9. 9.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
  11. 11.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a magnet (d) a pulley
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the light we look in
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a magnet (d) turmeric powder
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  15. 15.True or false: vinegar is neutral. (a) True (b) False
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) a battery cell (d) soap solution
  17. 17.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a battery cell (c) a magnet (d) a comb
  18. 18.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  19. 19.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  21. 21.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) soap solution (d) detergent water
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a magnet (d) water
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) turmeric powder (c) water (d) lemon juice
  26. 26.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  27. 27.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  30. 30.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  31. 31.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  32. 32.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) plain water (d) curd
  33. 33.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  35. 35.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  36. 36.🔍 Which is the odd one out? (a) vinegar (b) sugar water (c) tamarind water (d) soap solution
  37. 37.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) vinegar (d) detergent water
  38. 38.🛟 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
  39. 39.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  40. 40.True or false: soap solution is not needed for the turmeric test. (a) False (b) True

Answer key

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

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