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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 798 · 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? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
  2. 2.True or false: vinegar is an acid. (a) True (b) False
  3. 3.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) yeast (d) soap solution
  4. 4.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  5. 5.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  6. 6.True or false: vinegar is a base. (a) False (b) True
  7. 7.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  8. 8.True or false: water is not needed for the turmeric test. (a) True (b) False
  9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  10. 10.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a dropper or spoon (c) a balloon (d) yeast
  12. 12.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
  13. 13.⚖️ 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 turmeric paper
  14. 14.True or false: yeast is needed for the turmeric test. (a) False (b) True
  15. 15.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  17. 17.True or false: baking soda water is a base. (a) False (b) True
  18. 18.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it turns darker red (d) it disappears
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) plain water (d) soap solution
  20. 20.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a dropper or spoon (d) a mirror
  23. 23.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) lemon juice (d) soap solution
  25. 25.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  26. 26.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a magnet (d) turmeric powder
  28. 28.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  29. 29.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  31. 31.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  32. 32.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  33. 33.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  34. 34.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  35. 35.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  36. 36.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) yeast (c) soap solution (d) water
  39. 39.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base

Answer key

  1. the colour we see
  2. True
  3. soap solution
  4. True
  5. use only kitchen items
  6. False
  7. False
  8. False
  9. an indicator
  10. not needed
  11. a dropper or spoon
  12. sugar water
  13. the turmeric paper
  14. False
  15. True
  16. False
  17. True
  18. it turns yellow again
  19. soap solution
  20. neutral
  21. reddish-brown
  22. a mirror
  23. stays yellow
  24. a magnet
  25. not needed
  26. salt water
  27. a magnet
  28. False
  29. False
  30. needed
  31. True
  32. needed
  33. True
  34. True
  35. lemon juice
  36. lemon juice
  37. False
  38. yeast
  39. turns reddish-brown
  40. soap water is a base

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