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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 914 · 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: sugar water turns turmeric reddish-brown. (a) True (b) False
  2. 2.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) plain water (c) baking soda water (d) tamarind water
  4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  5. 5.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  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: lemon juice is an acid. (a) False (b) True
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
  9. 9.⚖️ 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
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the light we look in
  13. 13.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  14. 14.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  15. 15.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  16. 16.True or false: vinegar is neutral. (a) True (b) False
  17. 17.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) salt water (d) detergent water
  18. 18.🫧 Which of these is a base? (a) lemon juice (b) curd (c) tamarind water (d) baking soda water
  19. 19.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) tamarind water (d) soap solution
  21. 21.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) a dropper or spoon (c) white paper strips (d) soap solution
  23. 23.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  24. 24.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  25. 25.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  27. 27.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) baking soda water (d) soap solution
  29. 29.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  30. 30.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
  31. 31.True or false: plain water is a base. (a) False (b) True
  32. 32.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  34. 34.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  36. 36.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
  38. 38.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  39. 39.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes

Answer key

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

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