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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 171 · 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) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
  2. 2.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue
  4. 4.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  5. 5.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) salt water (d) baking soda water
  6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
  7. 7.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  10. 10.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  11. 11.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  13. 13.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) vinegar (d) detergent water
  14. 14.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  16. 16.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  17. 17.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
  18. 18.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) plain water (d) soap solution
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) turmeric powder (d) soap solution
  22. 22.🛟 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
  23. 23.True or false: salt water is neutral. (a) False (b) True
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) soap solution (d) salt water
  25. 25.⚖️ 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 change it (c) we measure it
  26. 26.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  28. 28.True or false: plain water is neutral. (a) True (b) False
  29. 29.True or false: orange juice is an acid. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  32. 32.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) white paper strips (d) yeast
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
  35. 35.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  36. 36.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  37. 37.True or false: water is needed for the turmeric test. (a) True (b) False
  38. 38.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  39. 39.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) lemon juice (d) yeast

Answer key

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

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