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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 387 · 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 number of drops is kept the same. (a) True (b) False
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) detergent water (d) lemon juice
  3. 3.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a prism (d) a pulley
  4. 4.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  5. 5.True or false: salt water is neutral. (a) False (b) True
  6. 6.⚖️ 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
  7. 7.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) soap solution (c) white paper strips (d) water
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) yeast (d) a dropper or spoon
  12. 12.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) sugar water (d) detergent water
  13. 13.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  14. 14.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  15. 15.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) lemon juice (d) water
  18. 18.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) detergent water (d) curd
  19. 19.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) plain water (d) detergent water
  20. 20.True or false: baking soda water is an acid. (a) True (b) False
  21. 21.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) a battery cell (d) a dropper or spoon
  23. 23.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  24. 24.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  25. 25.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  27. 27.⚖️ 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 turmeric paper (c) the number of drops (d) the light we look in
  28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
  29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  30. 30.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  31. 31.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) white paper strips (c) water (d) lemon juice
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  34. 34.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  35. 35.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
  37. 37.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) a mirror (d) white paper strips
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) tamarind water (d) baking soda water
  40. 40.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False

Answer key

  1. True
  2. detergent water
  3. an indicator
  4. an acid
  5. True
  6. False
  7. stays yellow
  8. False
  9. True
  10. a balloon
  11. yeast
  12. sugar water
  13. needed
  14. a base
  15. False
  16. False
  17. a magnet
  18. curd
  19. detergent water
  20. False
  21. not needed
  22. a dropper or spoon
  23. an acid
  24. True
  25. turns reddish-brown
  26. we keep it the same
  27. the liquid we test
  28. soap water is a base
  29. reddish-brown
  30. False
  31. an old shirt or apron
  32. a comb
  33. we keep it the same
  34. needed
  35. True
  36. lemon juice
  37. a base
  38. a mirror
  39. baking soda water
  40. False

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