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Turmeric Indicator Experiment Worksheet

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

Answer key

  1. False
  2. soap solution
  3. False
  4. water
  5. use only kitchen items
  6. we measure it
  7. soap water is a base
  8. an old shirt or apron
  9. turns reddish-brown
  10. white paper strips
  11. stays yellow
  12. reddish-brown
  13. False
  14. reddish
  15. False
  16. a comb
  17. not needed
  18. True
  19. needed
  20. False
  21. an indicator
  22. it stays yellow
  23. the liquid we test
  24. turns reddish-brown
  25. plain water
  26. False
  27. detergent water
  28. False
  29. sugar water
  30. False
  31. False
  32. plain water
  33. an acid
  34. we keep it the same
  35. lemon juice
  36. not needed
  37. salt water
  38. True
  39. we keep it the same
  40. False

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