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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 87 · 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: lemon juice keeps turmeric yellow. (a) False (b) True
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) a prism (d) an indicator
  3. 3.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
  4. 4.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  5. 5.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  7. 7.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) salt water (d) curd
  8. 8.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) lemon juice (d) white paper strips
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  11. 11.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a mirror (c) a balloon (d) a magnet
  12. 12.True or false: soap solution is neutral. (a) False (b) True
  13. 13.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  14. 14.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  15. 15.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  16. 16.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  17. 17.True or false: plain water keeps turmeric yellow. (a) True (b) False
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) turmeric powder (d) yeast
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  21. 21.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  22. 22.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  23. 23.True or false: a comb is needed for the turmeric test. (a) True (b) False
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
  25. 25.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) soap solution (d) lemon juice
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) baking soda water (d) tamarind water
  30. 30.🫧 Which of these is neutral? (a) soap solution (b) plain water (c) orange juice (d) vinegar
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  33. 33.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  34. 34.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
  35. 35.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) vinegar (d) soap solution
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) white paper strips (d) soap solution
  38. 38.True or false: lemon juice is neutral. (a) True (b) False
  39. 39.⚖️ 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 measure it (c) we change it
  40. 40.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed

Answer key

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

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