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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 54 · 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: curd is a base. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) lemon juice (c) a dropper or spoon (d) water
  6. 6.True or false: tamarind water is an acid. (a) False (b) True
  7. 7.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
  8. 8.⚖️ 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
  9. 9.True or false: water is not needed for the turmeric test. (a) False (b) True
  10. 10.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  11. 11.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  12. 12.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.🫧 Which of these is an acid? (a) lemon juice (b) plain water (c) detergent water (d) salt water
  14. 14.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  15. 15.True or false: lemon juice is a base. (a) True (b) False
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) vinegar (d) soap solution
  18. 18.🫧 Which of these is neutral? (a) curd (b) salt water (c) soap solution (d) lemon juice
  19. 19.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  21. 21.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) yeast (d) turmeric powder
  23. 23.⚖️ 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 measure it (c) we change it
  24. 24.🫧 Which of these is a base? (a) curd (b) tamarind water (c) lemon juice (d) detergent water
  25. 25.True or false: curd is an acid. (a) True (b) False
  26. 26.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) white paper strips (d) a balloon
  28. 28.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  29. 29.⚖️ 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 turmeric paper (c) the light we look in (d) the liquid we test
  30. 30.🟡 Which of these keeps turmeric yellow? (a) salt water (b) soap solution (c) baking soda water (d) detergent water
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  33. 33.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  34. 34.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) vinegar (d) sugar water
  35. 35.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  36. 36.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) water (d) lemon juice
  38. 38.True or false: sugar water is a base. (a) False (b) True
  39. 39.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
  40. 40.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard

Answer key

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

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