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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 657 · 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.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  2. 2.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) water (c) a magnet (d) a battery cell
  3. 3.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  4. 4.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  5. 5.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  6. 6.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  7. 7.⚖️ 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 measure it (c) we change it
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  9. 9.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  10. 10.True or false: water is needed for the turmeric test. (a) True (b) False
  11. 11.🫧 Which of these is an acid? (a) salt water (b) lemon juice (c) detergent water (d) baking soda water
  12. 12.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
  13. 13.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  14. 14.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  15. 15.⚖️ 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 turmeric paper (d) the liquid we test
  16. 16.🫧 Which of these is an acid? (a) baking soda water (b) orange juice (c) plain water (d) soap solution
  17. 17.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  18. 18.⚖️ 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
  19. 19.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  22. 22.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  23. 23.True or false: a comb is needed for the turmeric test. (a) False (b) True
  24. 24.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  25. 25.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  26. 26.True or false: baking soda water is neutral. (a) True (b) False
  27. 27.True or false: plain water is an acid. (a) True (b) False
  28. 28.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  29. 29.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a comb (d) soap solution
  31. 31.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  33. 33.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) turmeric powder (d) a magnet
  35. 35.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) yeast (d) turmeric powder
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  38. 38.⚖️ 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
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) turmeric powder (d) soap solution
  40. 40.True or false: a comb is not needed for the turmeric test. (a) False (b) True

Answer key

  1. use only kitchen items
  2. water
  3. needed
  4. True
  5. True
  6. True
  7. we measure it
  8. True
  9. not needed
  10. True
  11. lemon juice
  12. sugar water
  13. neutral
  14. an acid
  15. the colour we see
  16. orange juice
  17. neutral
  18. we change it
  19. False
  20. an old shirt or apron
  21. True
  22. needed
  23. False
  24. reddish-brown
  25. True
  26. False
  27. False
  28. True
  29. soap water is a base
  30. a comb
  31. it stays yellow
  32. we keep it the same
  33. False
  34. a magnet
  35. reddish
  36. yeast
  37. True
  38. we keep it the same
  39. a mirror
  40. True

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