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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 124 · 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 vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) white paper strips (d) yeast
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  4. 4.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a comb (d) water
  7. 7.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) yeast (d) white paper strips
  9. 9.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  10. 10.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.🔮 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) reddish (d) green
  12. 12.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.⚖️ 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 keep it the same (c) we measure it
  14. 14.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  15. 15.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) detergent water (c) plain water (d) sugar water
  17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
  20. 20.True or false: baking soda water is a base. (a) True (b) False
  21. 21.⚖️ 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 liquid we test (c) the number of drops (d) the turmeric paper
  22. 22.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) soap solution (d) detergent water
  23. 23.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  24. 24.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) soap solution (d) tamarind water
  25. 25.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  27. 27.True or false: salt water is a base. (a) True (b) False
  28. 28.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) tamarind water (d) salt water
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  32. 32.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) a mirror (d) turmeric powder
  33. 33.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  34. 34.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  35. 35.🔍 Which is the odd one out? (a) vinegar (b) sugar water (c) salt water (d) baking soda water
  36. 36.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  37. 37.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  38. 38.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  39. 39.🫧 Which of these is neutral? (a) vinegar (b) salt water (c) curd (d) detergent water
  40. 40.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed

Answer key

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

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