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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 808 · 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.

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

Answer key

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

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