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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 640 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) a battery cell (d) lemon juice
  3. 3.⚖️ 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 number of drops
  4. 4.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) plain water (d) tamarind water
  5. 5.🔮 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
  6. 6.⚖️ 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
  7. 7.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  8. 8.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  10. 10.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  11. 11.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  12. 12.🫧 Which of these is a base? (a) orange juice (b) soap solution (c) salt water (d) vinegar
  13. 13.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) detergent water (d) sugar water
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  15. 15.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  17. 17.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) sugar water (c) soap solution (d) detergent water
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the number of drops
  19. 19.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
  20. 20.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  21. 21.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  24. 24.True or false: tamarind water is neutral. (a) True (b) False
  25. 25.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) detergent water (d) soap solution
  26. 26.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.True or false: curd is a base. (a) True (b) False
  28. 28.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  29. 29.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) vinegar (d) sugar water
  30. 30.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  32. 32.True or false: plain water is neutral. (a) True (b) False
  33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) yeast (d) water
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  36. 36.🧺 Which of these is needed for the turmeric test? (a) yeast (b) soap solution (c) a magnet (d) a comb
  37. 37.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns yellow again (d) it turns darker red
  38. 38.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  39. 39.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution

Answer key

  1. False
  2. a battery cell
  3. the number of drops
  4. soap solution
  5. reddish
  6. we keep it the same
  7. False
  8. turns reddish-brown
  9. False
  10. True
  11. not needed
  12. soap solution
  13. detergent water
  14. we keep it the same
  15. plain water
  16. it stays yellow
  17. sugar water
  18. the liquid we test
  19. soap water is a base
  20. True
  21. stays yellow
  22. False
  23. False
  24. False
  25. tamarind water
  26. turns reddish-brown
  27. False
  28. vinegar
  29. soap solution
  30. needed
  31. we change it
  32. True
  33. reddish-brown
  34. water
  35. False
  36. soap solution
  37. it turns yellow again
  38. an acid
  39. True
  40. sugar water

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