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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 558 · 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: sugar water is neutral. (a) True (b) False
  2. 2.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  3. 3.True or false: vinegar is a base. (a) False (b) True
  4. 4.True or false: plain water keeps turmeric yellow. (a) False (b) True
  5. 5.True or false: tamarind water is a base. (a) False (b) True
  6. 6.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  8. 8.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a comb (c) soap solution (d) a dropper or spoon
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  12. 12.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  13. 13.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  15. 15.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  17. 17.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) curd (d) baking soda water
  18. 18.🛟 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
  19. 19.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  21. 21.⚖️ 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 light we look in (c) the colour we see (d) the number of drops
  22. 22.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
  23. 23.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  24. 24.🫧 Which of these is a base? (a) plain water (b) vinegar (c) salt water (d) baking soda water
  25. 25.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  26. 26.True or false: baking soda water is a base. (a) False (b) True
  27. 27.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  29. 29.True or false: soap solution is a base. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  31. 31.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
  32. 32.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) turmeric powder (d) a balloon
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  35. 35.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
  36. 36.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) turmeric powder (c) white paper strips (d) lemon juice
  38. 38.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the number of drops
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress

Answer key

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

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