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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 439 · 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.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  2. 2.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  4. 4.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) orange juice (d) salt water
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  6. 6.True or false: detergent water is an acid. (a) False (b) True
  7. 7.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  9. 9.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  10. 10.True or false: curd is an acid. (a) False (b) True
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a magnet
  13. 13.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  14. 14.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  15. 15.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) baking soda water (d) detergent water
  16. 16.True or false: sugar water is neutral. (a) False (b) True
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) lemon juice (d) yeast
  18. 18.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
  19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
  20. 20.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
  21. 21.True or false: water is needed for the turmeric test. (a) True (b) False
  22. 22.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  23. 23.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
  24. 24.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the turmeric paper (d) the colour we see
  26. 26.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) soap solution
  27. 27.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) soap solution (d) a magnet
  29. 29.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  30. 30.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) soap solution (d) a battery cell
  32. 32.True or false: baking soda water is neutral. (a) False (b) True
  33. 33.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the turmeric paper
  35. 35.🫧 Which of these is an acid? (a) soap solution (b) lemon juice (c) sugar water (d) baking soda water
  36. 36.⚖️ 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 change it (c) we measure it
  37. 37.🔮 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
  38. 38.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  39. 39.True or false: a comb is needed for the turmeric test. (a) True (b) False
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False

Answer key

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

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