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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 913 · 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: baking soda water turns turmeric reddish-brown. (a) True (b) False
  2. 2.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) lemon juice (d) a balloon
  4. 4.🫧 Which of these is an acid? (a) detergent water (b) soap solution (c) sugar water (d) tamarind water
  5. 5.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) baking soda water (d) vinegar
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
  7. 7.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  8. 8.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
  9. 9.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  10. 10.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  12. 12.🫧 Which of these is neutral? (a) orange juice (b) sugar water (c) lemon juice (d) tamarind water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a magnet (d) water
  14. 14.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) baking soda water (d) vinegar
  16. 16.⚖️ 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
  17. 17.True or false: detergent water is neutral. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  19. 19.⚖️ 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
  20. 20.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  21. 21.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  22. 22.True or false: salt water keeps turmeric yellow. (a) True (b) False
  23. 23.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) soap solution (d) sugar water
  24. 24.⚖️ 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 light we look in
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a comb (c) white paper strips (d) turmeric powder
  26. 26.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) turmeric powder (d) a battery cell
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
  29. 29.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) sugar water (d) soap solution
  30. 30.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a comb (c) turmeric powder (d) lemon juice
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) turmeric powder (d) a balloon
  33. 33.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
  34. 34.True or false: yeast is needed for the turmeric test. (a) True (b) False
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  36. 36.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) lemon juice
  37. 37.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  38. 38.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
  39. 39.True or false: lemon juice is a base. (a) True (b) False
  40. 40.True or false: baking soda water keeps turmeric yellow. (a) True (b) False

Answer key

  1. True
  2. False
  3. a balloon
  4. tamarind water
  5. baking soda water
  6. an old shirt or apron
  7. needed
  8. soap water is a base
  9. needed
  10. stays yellow
  11. soap solution
  12. sugar water
  13. a magnet
  14. turns reddish-brown
  15. vinegar
  16. the light we look in
  17. False
  18. vinegar
  19. we change it
  20. False
  21. False
  22. True
  23. curd
  24. the colour we see
  25. a comb
  26. False
  27. a battery cell
  28. the liquid we test
  29. soap solution
  30. False
  31. a comb
  32. a balloon
  33. an indicator
  34. False
  35. False
  36. detergent water
  37. not needed
  38. use only kitchen items
  39. False
  40. False

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