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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 544 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  3. 3.True or false: vinegar is an acid. (a) False (b) True
  4. 4.True or false: curd is an acid. (a) True (b) False
  5. 5.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  6. 6.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) plain water (d) orange juice
  7. 7.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  9. 9.🫧 Which of these is a base? (a) vinegar (b) plain water (c) salt water (d) baking soda water
  10. 10.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) white paper strips (d) a comb
  12. 12.🫧 Which of these is neutral? (a) soap solution (b) tamarind water (c) salt water (d) detergent water
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  14. 14.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a battery cell (d) lemon juice
  15. 15.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a mirror (d) lemon juice
  18. 18.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  19. 19.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the number of drops
  21. 21.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) a magnet (d) a battery cell
  22. 22.True or false: tamarind water is an acid. (a) True (b) False
  23. 23.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) tamarind water (d) sugar water
  24. 24.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  25. 25.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) tamarind water (d) baking soda water
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) water (b) a mirror (c) turmeric powder (d) lemon juice
  29. 29.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  30. 30.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  32. 32.True or false: baking soda water is neutral. (a) False (b) True
  33. 33.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  35. 35.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  36. 36.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) yeast (c) a magnet (d) a comb
  37. 37.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  38. 38.⚖️ 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
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) water (d) lemon juice
  40. 40.True or false: baking soda water keeps turmeric yellow. (a) True (b) False

Answer key

  1. True
  2. False
  3. True
  4. True
  5. True
  6. orange juice
  7. an acid
  8. we change it
  9. baking soda water
  10. not needed
  11. white paper strips
  12. salt water
  13. False
  14. lemon juice
  15. stays yellow
  16. soap solution
  17. a mirror
  18. an indicator
  19. True
  20. the colour we see
  21. water
  22. True
  23. detergent water
  24. needed
  25. stays yellow
  26. baking soda water
  27. True
  28. a mirror
  29. False
  30. an acid
  31. reddish-brown
  32. False
  33. stays yellow
  34. reddish
  35. needed
  36. soap solution
  37. an old shirt or apron
  38. we keep it the same
  39. a magnet
  40. False

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