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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 721 · 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.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  2. 2.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) a balloon (d) a dropper or spoon
  3. 3.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  4. 4.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it turns blue (d) it disappears
  5. 5.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) a magnet (d) an indicator
  6. 6.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  7. 7.🛟 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
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
  9. 9.True or false: vinegar is an acid. (a) False (b) True
  10. 10.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) white paper strips (d) a mirror
  12. 12.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) vinegar (d) baking soda water
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) a comb (d) soap solution
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a mirror (c) water (d) soap solution
  15. 15.⚖️ 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
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  17. 17.⚖️ 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
  18. 18.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) soap solution (d) yeast
  20. 20.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  22. 22.True or false: tamarind water is neutral. (a) True (b) False
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  24. 24.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  25. 25.🫧 Which of these is neutral? (a) salt water (b) lemon juice (c) vinegar (d) tamarind water
  26. 26.⚖️ 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 number of drops
  27. 27.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  28. 28.🫧 Which of these is an acid? (a) curd (b) soap solution (c) plain water (d) baking soda water
  29. 29.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) salt water (d) detergent water
  31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) water (d) yeast
  34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  35. 35.True or false: plain water is neutral. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) salt water (d) sugar water
  37. 37.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
  38. 38.⚖️ 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
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) soap solution (d) lemon juice
  40. 40.True or false: sugar water is neutral. (a) True (b) False

Answer key

  1. lemon juice
  2. a dropper or spoon
  3. False
  4. it turns yellow again
  5. an indicator
  6. a base
  7. use only kitchen items
  8. the turmeric paper
  9. True
  10. needed
  11. white paper strips
  12. baking soda water
  13. a comb
  14. a mirror
  15. we change it
  16. False
  17. we measure it
  18. needed
  19. soap solution
  20. False
  21. tamarind water
  22. False
  23. we keep it the same
  24. needed
  25. salt water
  26. the number of drops
  27. False
  28. curd
  29. turns reddish-brown
  30. detergent water
  31. stays yellow
  32. stays yellow
  33. yeast
  34. reddish-brown
  35. True
  36. detergent water
  37. salt water
  38. False
  39. a comb
  40. True

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