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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 680 · 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.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) water (d) a battery cell
  3. 3.⚖️ 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
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a balloon (d) white paper strips
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a mirror (d) white paper strips
  6. 6.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
  8. 8.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  9. 9.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  10. 10.True or false: plain water is an acid. (a) False (b) True
  11. 11.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  12. 12.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) yeast (d) water
  14. 14.True or false: salt water is an acid. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  16. 16.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  17. 17.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  18. 18.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  19. 19.⚖️ 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 liquid we test (c) the colour we see (d) the light we look in
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) vinegar (d) detergent water
  21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  22. 22.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  23. 23.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
  24. 24.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  26. 26.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  27. 27.True or false: detergent water is a base. (a) True (b) False
  28. 28.True or false: baking soda water is a base. (a) False (b) True
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (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 colour we see (c) the light we look in
  31. 31.⚖️ 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 number of drops (d) the colour we see
  32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
  33. 33.🫧 Which of these is an acid? (a) salt water (b) curd (c) detergent water (d) sugar water
  34. 34.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) lemon juice (d) plain water
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) a mirror (d) lemon juice
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) water (d) soap solution
  37. 37.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  38. 38.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  39. 39.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.True or false: plain water keeps turmeric yellow. (a) False (b) True

Answer key

  1. stays yellow
  2. a battery cell
  3. the turmeric paper
  4. a balloon
  5. a mirror
  6. True
  7. tamarind water
  8. not needed
  9. turns reddish-brown
  10. False
  11. True
  12. vinegar
  13. yeast
  14. False
  15. False
  16. not needed
  17. neutral
  18. False
  19. the liquid we test
  20. detergent water
  21. reddish
  22. neutral
  23. an old shirt or apron
  24. use only kitchen items
  25. False
  26. needed
  27. True
  28. True
  29. False
  30. the light we look in
  31. the colour we see
  32. soap water is a base
  33. curd
  34. soap solution
  35. lemon juice
  36. a magnet
  37. False
  38. False
  39. stays yellow
  40. True

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