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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 850 · 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 is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  3. 3.🫧 Which of these is a base? (a) salt water (b) soap solution (c) lemon juice (d) orange juice
  4. 4.🫧 Which of these is neutral? (a) orange juice (b) vinegar (c) curd (d) sugar water
  5. 5.🔮 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
  6. 6.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a pulley (d) a magnet
  9. 9.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) plain water (d) baking soda water
  10. 10.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  11. 11.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the turmeric paper
  13. 13.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  14. 14.⚖️ 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 change it (c) we keep it the same
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) lemon juice (d) a comb
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  17. 17.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  18. 18.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) baking soda water (d) lemon juice
  19. 19.⚖️ 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
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  21. 21.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) plain water (c) lemon juice (d) vinegar
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  24. 24.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  25. 25.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  26. 26.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  27. 27.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  28. 28.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) white paper strips (d) turmeric powder
  30. 30.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  31. 31.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  32. 32.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.🫧 Which of these is a base? (a) lemon juice (b) sugar water (c) baking soda water (d) salt water
  34. 34.True or false: water is not needed for the turmeric test. (a) False (b) True
  35. 35.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  36. 36.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) soap solution (d) orange juice
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  38. 38.⚖️ 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 number of drops (c) the colour we see (d) the turmeric paper
  39. 39.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.True or false: a magnet is needed for the turmeric test. (a) True (b) False

Answer key

  1. salt water
  2. reddish-brown
  3. soap solution
  4. sugar water
  5. it stays yellow
  6. turns reddish-brown
  7. soap water is a base
  8. an indicator
  9. plain water
  10. not needed
  11. True
  12. the colour we see
  13. not needed
  14. we keep it the same
  15. a comb
  16. False
  17. a base
  18. baking soda water
  19. we change it
  20. True
  21. it stays yellow
  22. detergent water
  23. True
  24. True
  25. False
  26. neutral
  27. True
  28. stays yellow
  29. a magnet
  30. vinegar
  31. needed
  32. an acid
  33. baking soda water
  34. False
  35. neutral
  36. orange juice
  37. lemon juice
  38. the liquid we test
  39. turns reddish-brown
  40. False

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