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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 47 · 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: sugar water is a base. (a) True (b) False
  2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  3. 3.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  4. 4.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  6. 6.True or false: salt water is an acid. (a) True (b) False
  7. 7.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.⚖️ 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
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a battery cell (c) turmeric powder (d) white paper strips
  10. 10.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a comb (d) lemon juice
  11. 11.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  13. 13.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  14. 14.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  17. 17.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  18. 18.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) salt water (d) soap solution
  19. 19.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a pulley (d) a prism
  20. 20.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
  21. 21.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  22. 22.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) turmeric powder (c) white paper strips (d) a dropper or spoon
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  25. 25.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  26. 26.🟡 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
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  29. 29.🫧 Which of these is a base? (a) tamarind water (b) curd (c) detergent water (d) lemon juice
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) turmeric powder (d) white paper strips
  31. 31.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) plain water (c) sugar water (d) tamarind water
  33. 33.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) tamarind water (d) baking soda water
  35. 35.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  36. 36.🫧 Which of these is a base? (a) baking soda water (b) salt water (c) tamarind water (d) curd
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) a dropper or spoon (d) turmeric powder
  38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  39. 39.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  40. 40.True or false: curd is neutral. (a) True (b) False

Answer key

  1. False
  2. it stays yellow
  3. False
  4. True
  5. reddish-brown
  6. False
  7. stays yellow
  8. we change it
  9. a battery cell
  10. lemon juice
  11. turns reddish-brown
  12. False
  13. needed
  14. a base
  15. turns reddish-brown
  16. stays yellow
  17. stays yellow
  18. soap solution
  19. an indicator
  20. lemon juice
  21. vinegar
  22. reddish-brown
  23. a battery cell
  24. we keep it the same
  25. False
  26. soap water is a base
  27. False
  28. False
  29. detergent water
  30. a balloon
  31. False
  32. detergent water
  33. needed
  34. tamarind water
  35. True
  36. baking soda water
  37. yeast
  38. an acid
  39. needed
  40. False

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