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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 650 · 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.

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

Answer key

  1. yeast
  2. an acid
  3. water
  4. sugar water
  5. a mirror
  6. a magnet
  7. baking soda water
  8. needed
  9. True
  10. a balloon
  11. we keep it the same
  12. stays yellow
  13. needed
  14. it turns yellow again
  15. we measure it
  16. False
  17. an acid
  18. False
  19. True
  20. True
  21. soap solution
  22. True
  23. False
  24. lemon juice
  25. reddish-brown
  26. an acid
  27. a mirror
  28. soap solution
  29. False
  30. True
  31. orange juice
  32. needed
  33. True
  34. baking soda water
  35. False
  36. salt water
  37. True
  38. stays yellow
  39. use only kitchen items
  40. we change it

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