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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 956 · 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? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  3. 3.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  4. 4.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  5. 5.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  6. 6.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
  7. 7.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
  8. 8.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.True or false: salt water is an acid. (a) True (b) False
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a battery cell (d) turmeric powder
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) baking soda water (d) vinegar
  12. 12.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  13. 13.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  14. 14.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  16. 16.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a balloon (d) water
  18. 18.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) soap solution (d) salt water
  20. 20.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) a dropper or spoon (d) water
  22. 22.True or false: plain water keeps turmeric yellow. (a) False (b) True
  23. 23.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  24. 24.True or false: lemon juice is an acid. (a) False (b) True
  25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  26. 26.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the light we look in
  28. 28.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the light we look in (d) the colour we see
  30. 30.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  31. 31.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  32. 32.True or false: tamarind water is an acid. (a) True (b) False
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  34. 34.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  35. 35.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  36. 36.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  37. 37.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) sugar water (d) lemon juice
  38. 38.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) turmeric powder (d) a mirror
  40. 40.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid

Answer key

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

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