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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 393 · 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: curd is an acid. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  3. 3.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) vinegar (d) sugar water
  4. 4.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) a dropper or spoon (d) water
  6. 6.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  9. 9.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) lemon juice (d) a battery cell
  10. 10.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.True or false: baking soda water is a base. (a) False (b) True
  12. 12.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  13. 13.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) soap solution (c) vinegar (d) lemon juice
  14. 14.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a mirror (c) water (d) lemon juice
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) soap solution (c) water (d) turmeric powder
  17. 17.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  19. 19.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  22. 22.🛟 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
  23. 23.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) soap solution (d) yeast
  24. 24.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  25. 25.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  26. 26.True or false: detergent water is a base. (a) False (b) True
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a balloon (d) turmeric powder
  28. 28.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  30. 30.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  31. 31.True or false: water is not needed for the turmeric test. (a) True (b) False
  32. 32.True or false: plain water is neutral. (a) False (b) True
  33. 33.⚖️ 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
  34. 34.🟡 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
  35. 35.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  36. 36.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the liquid we test
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  39. 39.True or false: salt water keeps turmeric yellow. (a) True (b) False
  40. 40.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True

Answer key

  1. True
  2. we keep it the same
  3. soap solution
  4. lemon juice
  5. a battery cell
  6. needed
  7. False
  8. we measure it
  9. lemon juice
  10. turns reddish-brown
  11. True
  12. reddish-brown
  13. soap solution
  14. False
  15. a mirror
  16. a mirror
  17. stays yellow
  18. an acid
  19. True
  20. turns reddish-brown
  21. we keep it the same
  22. an old shirt or apron
  23. soap solution
  24. True
  25. True
  26. True
  27. turmeric powder
  28. stays yellow
  29. False
  30. an acid
  31. False
  32. True
  33. we change it
  34. soap water is a base
  35. False
  36. True
  37. the liquid we test
  38. True
  39. True
  40. True

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