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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 282 · 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) baking soda water (b) soap solution (c) plain water (d) detergent water
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the colour we see
  3. 3.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  4. 4.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  5. 5.⚖️ 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
  6. 6.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) plain water (d) salt water
  7. 7.🔮 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
  8. 8.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  9. 9.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  10. 10.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  12. 12.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  13. 13.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  14. 14.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  15. 15.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  18. 18.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
  19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  20. 20.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  22. 22.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  23. 23.True or false: tamarind water is an acid. (a) False (b) True
  24. 24.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) a prism (d) an indicator
  25. 25.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) a magnet (d) yeast
  26. 26.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) a comb (d) lemon juice
  28. 28.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  29. 29.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  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: baking soda water keeps turmeric yellow. (a) False (b) True
  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 change it (c) we keep it the same
  34. 34.True or false: salt water keeps turmeric yellow. (a) False (b) True
  35. 35.🫧 Which of these is an acid? (a) curd (b) salt water (c) plain water (d) baking soda water
  36. 36.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  37. 37.🫧 Is sugar 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) yeast (b) a dropper or spoon (c) soap solution (d) turmeric powder
  39. 39.True or false: tamarind water is a base. (a) True (b) False
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True

Answer key

  1. plain water
  2. the liquid we test
  3. lemon juice
  4. True
  5. we measure it
  6. baking soda water
  7. it stays yellow
  8. True
  9. an acid
  10. a base
  11. vinegar
  12. neutral
  13. True
  14. False
  15. needed
  16. we change it
  17. False
  18. salt water
  19. reddish
  20. use only kitchen items
  21. the turmeric paper
  22. an acid
  23. True
  24. an indicator
  25. a dropper or spoon
  26. not needed
  27. lemon juice
  28. True
  29. False
  30. False
  31. True
  32. False
  33. we keep it the same
  34. True
  35. curd
  36. reddish-brown
  37. neutral
  38. yeast
  39. False
  40. True

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