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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 782 · 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.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) turmeric powder (d) a magnet
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  5. 5.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
  6. 6.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  7. 7.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  8. 8.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  9. 9.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  10. 10.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the turmeric paper (d) the number of drops
  12. 12.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  13. 13.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  14. 14.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  16. 16.True or false: curd is a base. (a) False (b) True
  17. 17.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a battery cell (c) soap solution (d) white paper strips
  21. 21.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  23. 23.True or false: curd is an acid. (a) True (b) False
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a comb (d) turmeric powder
  25. 25.True or false: lemon juice is neutral. (a) True (b) False
  26. 26.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) a magnet (d) lemon juice
  28. 28.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  29. 29.True or false: water is needed for the turmeric test. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) vinegar (d) lemon juice
  31. 31.⚖️ 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
  32. 32.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) salt water (d) soap solution
  34. 34.True or false: detergent water is a base. (a) False (b) True
  35. 35.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) soap solution (d) a magnet
  37. 37.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  38. 38.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it

Answer key

  1. a magnet
  2. False
  3. it stays yellow
  4. we keep it the same
  5. an indicator
  6. True
  7. neutral
  8. False
  9. neutral
  10. it turns yellow again
  11. the liquid we test
  12. True
  13. False
  14. False
  15. False
  16. False
  17. False
  18. the light we look in
  19. reddish-brown
  20. a battery cell
  21. an acid
  22. reddish-brown
  23. True
  24. a comb
  25. False
  26. soap solution
  27. lemon juice
  28. needed
  29. True
  30. detergent water
  31. True
  32. stays yellow
  33. soap solution
  34. True
  35. True
  36. a magnet
  37. False
  38. True
  39. we change it
  40. we measure it

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