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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 605 · 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 of these is neutral? (a) salt water (b) orange juice (c) lemon juice (d) vinegar
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) turmeric powder (d) white paper strips
  3. 3.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  5. 5.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  7. 7.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) lemon juice (d) plain water
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
  11. 11.🛟 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
  12. 12.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) tamarind water (d) detergent water
  13. 13.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
  14. 14.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  16. 16.🫧 Which of these is a base? (a) curd (b) baking soda water (c) lemon juice (d) plain water
  17. 17.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) detergent water (c) soap solution (d) baking soda water
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  19. 19.⚖️ 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
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) soap solution (d) a battery cell
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  22. 22.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  23. 23.⚖️ 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
  24. 24.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  25. 25.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  26. 26.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) water (d) a comb
  28. 28.True or false: soap solution is a base. (a) False (b) True
  29. 29.🫧 Which of these is an acid? (a) sugar water (b) tamarind water (c) baking soda water (d) salt water
  30. 30.True or false: salt water is neutral. (a) True (b) False
  31. 31.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) a mirror (d) white paper strips
  33. 33.🔍 Which is the odd one out? (a) sugar water (b) tamarind water (c) baking soda water (d) vinegar
  34. 34.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  35. 35.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  36. 36.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  37. 37.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) plain water (c) lemon juice (d) vinegar
  39. 39.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  40. 40.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow

Answer key

  1. salt water
  2. yeast
  3. stays yellow
  4. False
  5. stays yellow
  6. an acid
  7. detergent water
  8. reddish-brown
  9. True
  10. salt water
  11. an old shirt or apron
  12. tamarind water
  13. use only kitchen items
  14. vinegar
  15. True
  16. baking soda water
  17. sugar water
  18. we measure it
  19. False
  20. a battery cell
  21. we keep it the same
  22. needed
  23. we change it
  24. False
  25. False
  26. a base
  27. a comb
  28. True
  29. tamarind water
  30. True
  31. False
  32. a mirror
  33. baking soda water
  34. True
  35. False
  36. it stays yellow
  37. it turns yellow again
  38. detergent water
  39. an acid
  40. stays yellow

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