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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 816 · 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.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
  2. 2.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) water (d) turmeric powder
  4. 4.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) tamarind water (d) salt water
  7. 7.True or false: soap solution is a base. (a) True (b) False
  8. 8.True or false: orange juice is a base. (a) True (b) False
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) a battery cell
  10. 10.True or false: salt water keeps turmeric yellow. (a) False (b) True
  11. 11.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  12. 12.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) soap solution (d) detergent water
  13. 13.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) lemon juice (d) vinegar
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) plain water (c) salt water (d) tamarind water
  15. 15.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  16. 16.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) plain water (d) tamarind water
  17. 17.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  18. 18.True or false: yeast is needed for the turmeric test. (a) False (b) True
  19. 19.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  20. 20.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  22. 22.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  24. 24.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a mirror (d) white paper strips
  26. 26.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  28. 28.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  29. 29.True or false: orange juice is neutral. (a) False (b) True
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  31. 31.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test
  33. 33.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  34. 34.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
  36. 36.True or false: tamarind water is an acid. (a) True (b) False
  37. 37.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) vinegar (c) tamarind water (d) soap solution
  39. 39.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  40. 40.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True

Answer key

  1. an indicator
  2. True
  3. yeast
  4. needed
  5. it stays yellow
  6. baking soda water
  7. True
  8. False
  9. a battery cell
  10. True
  11. an acid
  12. tamarind water
  13. baking soda water
  14. detergent water
  15. False
  16. soap solution
  17. False
  18. False
  19. not needed
  20. neutral
  21. we keep it the same
  22. False
  23. reddish
  24. an acid
  25. a mirror
  26. needed
  27. needed
  28. False
  29. False
  30. False
  31. neutral
  32. the colour we see
  33. lemon juice
  34. an acid
  35. the number of drops
  36. True
  37. False
  38. soap solution
  39. needed
  40. False

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