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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 919 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  2. 2.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  3. 3.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  4. 4.🛟 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
  5. 5.⚖️ 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
  6. 6.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  7. 7.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a prism (d) a magnet
  8. 8.True or false: orange juice is an acid. (a) True (b) False
  9. 9.True or false: lemon juice is a base. (a) True (b) False
  10. 10.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
  11. 11.🫧 Which of these is a base? (a) plain water (b) salt water (c) baking soda water (d) vinegar
  12. 12.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) salt water
  15. 15.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) soap solution (d) tamarind water
  16. 16.⚖️ 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
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a balloon (d) lemon juice
  18. 18.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  19. 19.True or false: salt water keeps turmeric yellow. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the light we look in (d) the colour we see
  21. 21.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  22. 22.True or false: soap solution is neutral. (a) False (b) True
  23. 23.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  24. 24.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) lemon juice (d) soap solution
  25. 25.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  26. 26.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  27. 27.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) sugar water (d) tamarind water
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) white paper strips (d) a battery cell
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) turmeric powder (c) water (d) soap solution
  30. 30.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
  31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  33. 33.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  34. 34.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  36. 36.True or false: lemon juice is neutral. (a) True (b) False
  37. 37.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a magnet (d) a dropper or spoon
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  40. 40.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items

Answer key

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

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