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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 944 · 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 soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  2. 2.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
  3. 3.True or false: vinegar is a base. (a) True (b) False
  4. 4.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  7. 7.True or false: tamarind water is an acid. (a) True (b) False
  8. 8.🛟 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
  9. 9.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  10. 10.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  11. 11.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.⚖️ 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
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  14. 14.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) detergent water (d) plain water
  15. 15.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  16. 16.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  17. 17.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a comb (d) a battery cell
  18. 18.⚖️ 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 change it (c) we measure it
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  20. 20.True or false: water is not needed for the turmeric test. (a) False (b) True
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  22. 22.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the turmeric paper
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) turmeric powder (d) a magnet
  25. 25.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) detergent water (d) curd
  27. 27.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a dropper or spoon (d) yeast
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  30. 30.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  31. 31.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) salt water (d) vinegar
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a comb (d) water
  34. 34.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  35. 35.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) lemon juice (d) detergent water
  36. 36.🫧 Which of these is a base? (a) soap solution (b) sugar water (c) curd (d) lemon juice
  37. 37.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) plain water (d) soap solution
  38. 38.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) baking soda water (d) sugar water
  39. 39.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  40. 40.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) white paper strips (c) a comb (d) turmeric powder

Answer key

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

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