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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 753 · 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 baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) a comb (d) turmeric powder
  4. 4.True or false: baking soda water is a base. (a) True (b) False
  5. 5.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) a mirror
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
  9. 9.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) lemon juice (d) white paper strips
  11. 11.⚖️ 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 liquid we test (d) the light we look in
  12. 12.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  14. 14.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  15. 15.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a balloon (d) white paper strips
  17. 17.True or false: salt water is a base. (a) True (b) False
  18. 18.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) white paper strips (d) water
  20. 20.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) sugar water (d) detergent water
  21. 21.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  22. 22.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  23. 23.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a magnet (c) soap solution (d) lemon juice
  25. 25.🔍 Which is the odd one out? (a) plain water (b) salt water (c) detergent water (d) sugar water
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a comb (b) water (c) a mirror (d) a battery cell
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a mirror (d) a comb
  28. 28.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a mirror (c) water (d) lemon juice
  31. 31.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a mirror (d) white paper strips
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  33. 33.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) curd (d) vinegar
  34. 34.🔍 Which is the odd one out? (a) plain water (b) salt water (c) sugar water (d) soap solution
  35. 35.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
  37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  38. 38.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) baking soda water (d) soap solution
  39. 39.True or false: curd is an acid. (a) True (b) False
  40. 40.⚖️ 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 measure it (c) we keep it the same

Answer key

  1. a base
  2. True
  3. a comb
  4. True
  5. False
  6. a mirror
  7. False
  8. an indicator
  9. stays yellow
  10. a battery cell
  11. the liquid we test
  12. not needed
  13. not needed
  14. needed
  15. an acid
  16. a balloon
  17. False
  18. turns reddish-brown
  19. yeast
  20. sugar water
  21. False
  22. False
  23. not needed
  24. a magnet
  25. detergent water
  26. water
  27. turmeric powder
  28. needed
  29. we keep it the same
  30. a mirror
  31. white paper strips
  32. False
  33. plain water
  34. soap solution
  35. an acid
  36. soap water is a base
  37. reddish
  38. vinegar
  39. True
  40. we keep it the same

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