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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 302 · 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: water is not needed for the turmeric test. (a) False (b) True
  2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a battery cell (d) a dropper or spoon
  4. 4.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) yeast (c) a balloon (d) a mirror
  5. 5.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  6. 6.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  7. 7.True or false: plain water is neutral. (a) True (b) False
  8. 8.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  9. 9.🫧 Which of these is neutral? (a) lemon juice (b) baking soda water (c) orange juice (d) salt water
  10. 10.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) turmeric powder (d) soap solution
  15. 15.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  16. 16.⚖️ 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
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) vinegar (d) baking soda water
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) white paper strips (d) a comb
  19. 19.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  20. 20.⚖️ 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
  21. 21.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) sugar water (d) vinegar
  23. 23.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  24. 24.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  25. 25.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
  26. 26.True or false: vinegar is neutral. (a) False (b) True
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) a magnet (d) white paper strips
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) soap solution (d) a mirror
  29. 29.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  30. 30.🔮 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
  31. 31.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  32. 32.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) reddish (d) green
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the turmeric paper (d) the liquid we test
  36. 36.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) baking soda water (d) sugar water
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) lemon juice (d) soap solution
  39. 39.🫧 Which of these is a base? (a) sugar water (b) vinegar (c) curd (d) detergent water
  40. 40.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed

Answer key

  1. False
  2. it stays yellow
  3. a battery cell
  4. turmeric powder
  5. use only kitchen items
  6. needed
  7. True
  8. not needed
  9. salt water
  10. False
  11. True
  12. stays yellow
  13. needed
  14. a comb
  15. an acid
  16. we measure it
  17. baking soda water
  18. white paper strips
  19. False
  20. we keep it the same
  21. False
  22. detergent water
  23. False
  24. False
  25. soap solution
  26. False
  27. a magnet
  28. a mirror
  29. an indicator
  30. reddish-brown
  31. plain water
  32. reddish
  33. a base
  34. vinegar
  35. the colour we see
  36. baking soda water
  37. False
  38. a balloon
  39. detergent water
  40. needed

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