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Turmeric Indicator Experiment Worksheet

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

Answer key

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

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