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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 575 · 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.

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

Answer key

  1. False
  2. detergent water
  3. we change it
  4. tamarind water
  5. an acid
  6. False
  7. plain water
  8. False
  9. needed
  10. reddish-brown
  11. reddish-brown
  12. a mirror
  13. not needed
  14. False
  15. True
  16. it turns yellow again
  17. use only kitchen items
  18. False
  19. a battery cell
  20. an indicator
  21. False
  22. it stays yellow
  23. True
  24. turmeric powder
  25. salt water
  26. lemon juice
  27. detergent water
  28. baking soda water
  29. True
  30. False
  31. False
  32. we keep it the same
  33. sugar water
  34. True
  35. an acid
  36. stays yellow
  37. sugar water
  38. the colour we see
  39. stays yellow
  40. a magnet

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