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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 789 · 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: a magnet is needed for the turmeric test. (a) True (b) False
  2. 2.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) orange juice (d) salt water
  3. 3.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  4. 4.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  5. 5.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) salt water (d) baking soda water
  6. 6.True or false: curd is a base. (a) True (b) False
  7. 7.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  9. 9.True or false: vinegar is a base. (a) True (b) False
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the number of drops (d) the light we look in
  11. 11.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) salt water (d) plain water
  12. 12.🫧 Which of these is neutral? (a) curd (b) detergent water (c) soap solution (d) sugar water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) white paper strips (c) water (d) turmeric powder
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) white paper strips (c) turmeric powder (d) water
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) white paper strips (d) a comb
  17. 17.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  18. 18.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) soap solution
  19. 19.True or false: soap solution is an acid. (a) False (b) True
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  21. 21.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) lemon juice (d) a magnet
  23. 23.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
  25. 25.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  26. 26.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
  27. 27.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  28. 28.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) a comb (d) a dropper or spoon
  29. 29.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
  30. 30.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  31. 31.⚖️ 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
  32. 32.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) vinegar (d) detergent water
  33. 33.⚖️ 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
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
  35. 35.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  36. 36.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
  37. 37.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  38. 38.⚖️ 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
  39. 39.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) a prism (d) an indicator

Answer key

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

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