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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 948 · 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 is needed for the turmeric test. (a) True (b) False
  2. 2.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) vinegar (d) sugar water
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  4. 4.True or false: vinegar is neutral. (a) False (b) True
  5. 5.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  6. 6.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  8. 8.⚖️ 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
  9. 9.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  10. 10.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  11. 11.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  12. 12.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  13. 13.🫧 Which of these is a base? (a) soap solution (b) sugar water (c) orange juice (d) curd
  14. 14.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  15. 15.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  16. 16.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  17. 17.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  18. 18.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) reddish-brown (d) bright blue
  20. 20.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  21. 21.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  22. 22.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  23. 23.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns darker red (d) it turns blue
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  25. 25.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  27. 27.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  28. 28.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  29. 29.⚖️ 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
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  31. 31.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  32. 32.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  33. 33.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) a magnet (d) soap solution
  36. 36.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  37. 37.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a balloon (c) a mirror (d) turmeric powder
  38. 38.True or false: soap solution is a base. (a) False (b) True
  39. 39.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue

Answer key

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

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