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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 238 · 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.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the number of drops (d) the liquid we test
  3. 3.True or false: lemon juice is an acid. (a) False (b) True
  4. 4.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  5. 5.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) turmeric powder (d) a battery cell
  8. 8.🫧 Which of these is a base? (a) detergent water (b) vinegar (c) plain water (d) curd
  9. 9.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
  10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  11. 11.⚖️ 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 keep it the same (c) we change it
  12. 12.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  13. 13.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  15. 15.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  17. 17.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  18. 18.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  20. 20.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) plain water (d) lemon juice
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
  22. 22.⚖️ 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
  23. 23.True or false: plain water keeps turmeric yellow. (a) True (b) False
  24. 24.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) sugar water (d) curd
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) turmeric powder (c) lemon juice (d) water
  27. 27.🫧 Which of these is neutral? (a) plain water (b) baking soda water (c) lemon juice (d) detergent water
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) soap solution (d) a balloon
  29. 29.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  30. 30.True or false: salt water is an acid. (a) False (b) True
  31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) a mirror
  33. 33.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  36. 36.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  37. 37.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) a magnet (d) soap solution
  38. 38.True or false: vinegar is a base. (a) False (b) True
  39. 39.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  40. 40.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False

Answer key

  1. stays yellow
  2. the colour we see
  3. True
  4. False
  5. False
  6. use only kitchen items
  7. turmeric powder
  8. detergent water
  9. an old shirt or apron
  10. reddish
  11. we keep it the same
  12. True
  13. neutral
  14. True
  15. stays yellow
  16. stays yellow
  17. an acid
  18. True
  19. not needed
  20. soap solution
  21. the light we look in
  22. we change it
  23. True
  24. stays yellow
  25. curd
  26. yeast
  27. plain water
  28. a balloon
  29. plain water
  30. False
  31. it stays yellow
  32. a mirror
  33. True
  34. lemon juice
  35. not needed
  36. True
  37. soap solution
  38. False
  39. False
  40. False

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