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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 838 · 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? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.🫧 Which of these is a base? (a) tamarind water (b) curd (c) vinegar (d) soap solution
  3. 3.True or false: water is needed for the turmeric test. (a) False (b) True
  4. 4.True or false: baking soda water is an acid. (a) True (b) False
  5. 5.🫧 Which of these is neutral? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
  6. 6.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) yeast (c) water (d) soap solution
  8. 8.⚖️ 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
  9. 9.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  12. 12.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) tamarind water (d) sugar water
  13. 13.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  14. 14.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  15. 15.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) baking soda water (d) plain water
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) yeast (d) a comb
  17. 17.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  18. 18.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a magnet (d) a pulley
  19. 19.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) a comb (d) yeast
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the number of drops (d) the liquid we test
  22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
  23. 23.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  24. 24.True or false: vinegar is an acid. (a) False (b) True
  25. 25.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  26. 26.🔮 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
  27. 27.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  28. 28.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) turmeric powder (d) a battery cell
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) yeast (c) soap solution (d) water
  31. 31.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  32. 32.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.⚖️ 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
  34. 34.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) vinegar (d) lemon juice
  35. 35.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  36. 36.🍋 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
  37. 37.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  38. 38.True or false: detergent water is an acid. (a) False (b) True
  39. 39.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.True or false: a balloon is not needed for the turmeric test. (a) True (b) False

Answer key

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

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