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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 428 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) lemon juice (d) a dropper or spoon
  2. 2.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  3. 3.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  4. 4.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  5. 5.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) soap solution (c) a comb (d) a balloon
  6. 6.True or false: lemon juice is neutral. (a) False (b) True
  7. 7.⚖️ 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
  8. 8.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) turmeric powder (c) white paper strips (d) a dropper or spoon
  10. 10.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) baking soda water (d) salt water
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  13. 13.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
  14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  15. 15.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
  17. 17.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  19. 19.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  20. 20.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) orange juice (d) lemon juice
  21. 21.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  22. 22.True or false: baking soda water is neutral. (a) False (b) True
  23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  24. 24.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) lemon juice (c) yeast (d) a balloon
  28. 28.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  29. 29.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  30. 30.⚖️ 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
  31. 31.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
  33. 33.True or false: sugar water is an acid. (a) False (b) True
  34. 34.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  35. 35.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) plain water (d) tamarind water
  36. 36.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  37. 37.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🍋 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
  39. 39.True or false: salt water is an acid. (a) True (b) False
  40. 40.True or false: sugar water is neutral. (a) False (b) True

Answer key

  1. a balloon
  2. stays yellow
  3. needed
  4. an acid
  5. soap solution
  6. False
  7. we keep it the same
  8. True
  9. yeast
  10. baking soda water
  11. use only kitchen items
  12. we keep it the same
  13. reddish-brown
  14. reddish-brown
  15. lemon juice
  16. the liquid we test
  17. an acid
  18. an acid
  19. False
  20. baking soda water
  21. False
  22. False
  23. reddish
  24. it stays yellow
  25. False
  26. the number of drops
  27. lemon juice
  28. an old shirt or apron
  29. not needed
  30. we measure it
  31. not needed
  32. soap water is a base
  33. False
  34. an acid
  35. plain water
  36. False
  37. stays yellow
  38. it turns yellow again
  39. False
  40. True

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