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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 976 · 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.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  2. 2.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  3. 3.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  4. 4.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  5. 5.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  6. 6.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  7. 7.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  8. 8.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  9. 9.True or false: detergent water is a base. (a) False (b) True
  10. 10.🫧 Which of these is neutral? (a) orange juice (b) vinegar (c) lemon juice (d) sugar water
  11. 11.🫧 Which of these is neutral? (a) baking soda water (b) salt water (c) curd (d) orange juice
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) tamarind water
  15. 15.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) plain water (d) vinegar
  16. 16.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  17. 17.⚖️ 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
  18. 18.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
  19. 19.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  20. 20.🫧 Which of these is an acid? (a) salt water (b) tamarind water (c) sugar water (d) detergent water
  21. 21.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  22. 22.True or false: lemon juice is an acid. (a) True (b) False
  23. 23.⚖️ 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
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) baking soda water (c) tamarind water (d) sugar water
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the light we look in (d) the colour we see
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) yeast (c) white paper strips (d) water
  27. 27.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  28. 28.🫧 Which of these is a base? (a) soap solution (b) vinegar (c) plain water (d) lemon juice
  29. 29.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
  30. 30.🫧 Which of these is neutral? (a) baking soda water (b) plain water (c) vinegar (d) lemon juice
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) detergent water (c) plain water (d) sugar water
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) soap solution (d) a mirror
  33. 33.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  34. 34.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a comb (c) a mirror (d) a magnet
  35. 35.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  37. 37.True or false: vinegar is an acid. (a) False (b) True
  38. 38.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) tamarind water (d) soap solution
  39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
  40. 40.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow

Answer key

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

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