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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 188 · 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.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) a prism (d) an indicator
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the number of drops
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
  6. 6.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  7. 7.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  8. 8.True or false: tamarind water is an acid. (a) True (b) False
  9. 9.⚖️ 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 change it (c) we measure it
  10. 10.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  12. 12.🧺 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 battery cell (d) lemon juice
  13. 13.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  14. 14.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  15. 15.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
  16. 16.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  17. 17.⚖️ 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
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a mirror (c) water (d) a dropper or spoon
  19. 19.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: curd is an acid. (a) False (b) True
  22. 22.🫧 Which of these is a base? (a) salt water (b) sugar water (c) lemon juice (d) baking soda water
  23. 23.⚖️ 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
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) lemon juice (c) turmeric powder (d) water
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  26. 26.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  27. 27.True or false: sugar water is neutral. (a) True (b) False
  28. 28.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  29. 29.🟡 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
  30. 30.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  31. 31.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) lemon juice (d) salt water
  32. 32.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) a balloon (d) lemon juice
  34. 34.True or false: soap solution is a base. (a) False (b) True
  35. 35.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) plain water (d) vinegar
  36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  37. 37.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  38. 38.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) tamarind water (d) detergent water
  40. 40.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) baking soda water (d) tamarind water

Answer key

  1. True
  2. an indicator
  3. the turmeric paper
  4. the colour we see
  5. the number of drops
  6. neutral
  7. it stays yellow
  8. True
  9. we measure it
  10. False
  11. we change it
  12. a battery cell
  13. needed
  14. True
  15. use only kitchen items
  16. True
  17. we keep it the same
  18. a mirror
  19. stays yellow
  20. False
  21. True
  22. baking soda water
  23. we keep it the same
  24. a mirror
  25. True
  26. neutral
  27. True
  28. True
  29. soap water is a base
  30. False
  31. lemon juice
  32. stays yellow
  33. a balloon
  34. True
  35. plain water
  36. turns reddish-brown
  37. an old shirt or apron
  38. False
  39. detergent water
  40. baking soda water

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