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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 110 · 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 salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  2. 2.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) a comb (d) soap solution
  3. 3.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  5. 5.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) curd (d) baking soda water
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) turmeric powder (d) yeast
  10. 10.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  11. 11.True or false: baking soda water is a base. (a) False (b) True
  12. 12.True or false: orange juice is a base. (a) False (b) True
  13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  14. 14.⚖️ 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 colour we see (c) the light we look in (d) the turmeric paper
  15. 15.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
  16. 16.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) water (d) a magnet
  17. 17.🍋 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
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  19. 19.True or false: sugar water is neutral. (a) False (b) True
  20. 20.🔍 Which is the odd one out? (a) vinegar (b) detergent water (c) sugar water (d) lemon juice
  21. 21.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  22. 22.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  23. 23.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  24. 24.True or false: plain water keeps turmeric yellow. (a) True (b) False
  25. 25.True or false: lemon juice is a base. (a) False (b) True
  26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
  27. 27.🛟 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
  28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  29. 29.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a dropper or spoon (d) a mirror
  31. 31.True or false: salt water keeps turmeric yellow. (a) True (b) False
  32. 32.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) turmeric powder (d) a battery cell
  34. 34.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  35. 35.🫧 Which of these is neutral? (a) detergent water (b) vinegar (c) lemon juice (d) plain water
  36. 36.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) lemon juice (d) tamarind water
  37. 37.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) lemon juice (c) turmeric powder (d) white paper strips
  40. 40.🫧 Which of these is a base? (a) plain water (b) soap solution (c) sugar water (d) lemon juice

Answer key

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

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