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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 70 · 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: plain water is a base. (a) True (b) False
  2. 2.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.True or false: baking soda water is a base. (a) False (b) True
  5. 5.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  8. 8.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
  10. 10.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
  12. 12.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) lemon juice (d) salt water
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) plain water (d) detergent water
  15. 15.🫧 Which of these is a base? (a) detergent water (b) vinegar (c) tamarind water (d) curd
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) soap solution (c) a battery cell (d) a magnet
  17. 17.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) soap solution (d) white paper strips
  19. 19.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) tamarind water (d) detergent water
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  21. 21.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  22. 22.⚖️ 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 turmeric paper (c) the light we look in (d) the liquid we test
  23. 23.True or false: tamarind water is an acid. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
  25. 25.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) soap solution (d) detergent water
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a mirror
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a comb (d) a dropper or spoon
  28. 28.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
  29. 29.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  31. 31.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  32. 32.True or false: plain water keeps turmeric yellow. (a) True (b) False
  33. 33.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a balloon (c) yeast (d) a mirror
  34. 34.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  36. 36.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  38. 38.🟡 Which of these keeps turmeric yellow? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
  39. 39.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
  40. 40.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water

Answer key

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

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