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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 322 · 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.🔍 Which is the odd one out? (a) salt water (b) plain water (c) sugar water (d) baking soda water
  2. 2.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) baking soda water (d) tamarind water
  3. 3.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) lemon juice (d) a magnet
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  7. 7.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  8. 8.True or false: sugar water is neutral. (a) False (b) True
  9. 9.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  10. 10.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a battery cell (d) white paper strips
  12. 12.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a prism (d) a pulley
  13. 13.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  14. 14.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  16. 16.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  18. 18.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) sugar water (d) soap solution
  19. 19.⚖️ 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
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  21. 21.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) soap solution (d) plain water
  22. 22.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  23. 23.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) your best clothes (d) an old shirt or apron
  24. 24.⚖️ 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 change it (c) we measure it
  25. 25.⚖️ 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
  26. 26.True or false: yeast is needed for the turmeric test. (a) False (b) True
  27. 27.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) a dropper or spoon (d) a battery cell
  30. 30.True or false: curd is a base. (a) True (b) False
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) lemon juice (d) baking soda water
  32. 32.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  33. 33.🫧 Which of these is an acid? (a) plain water (b) salt water (c) detergent water (d) vinegar
  34. 34.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  35. 35.True or false: lemon juice is a base. (a) False (b) True
  36. 36.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  37. 37.🫧 Which of these is an acid? (a) baking soda water (b) lemon juice (c) detergent water (d) salt water
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a battery cell (d) white paper strips
  39. 39.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  40. 40.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items

Answer key

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

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