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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 562 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) baking soda water (d) sugar water
  3. 3.🟡 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
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) a balloon (d) a dropper or spoon
  5. 5.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  6. 6.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
  8. 8.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  9. 9.True or false: plain water is neutral. (a) True (b) False
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  11. 11.🔮 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) green (d) reddish
  12. 12.True or false: water is needed for the turmeric test. (a) True (b) False
  13. 13.⚖️ 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
  14. 14.🛟 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
  15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.⚖️ 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
  17. 17.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) white paper strips (d) yeast
  19. 19.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  21. 21.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  22. 22.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  23. 23.True or false: lemon juice is an acid. (a) True (b) False
  24. 24.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) white paper strips (d) a comb
  26. 26.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) a magnet (d) lemon juice
  28. 28.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  29. 29.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  30. 30.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
  31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  33. 33.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🟡 Which of these keeps turmeric yellow? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
  35. 35.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  37. 37.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  38. 38.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  39. 39.True or false: curd is an acid. (a) False (b) True
  40. 40.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False

Answer key

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

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