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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 691 · 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) baking soda water (b) soap solution (c) vinegar (d) detergent water
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
  3. 3.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  6. 6.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  8. 8.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  11. 11.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  12. 12.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) water (d) a comb
  14. 14.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  15. 15.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) baking soda water (c) sugar water (d) lemon juice
  17. 17.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  18. 18.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
  20. 20.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  21. 21.True or false: sugar water is an acid. (a) True (b) False
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  23. 23.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  24. 24.🫧 Which of these is neutral? (a) salt water (b) soap solution (c) lemon juice (d) vinegar
  25. 25.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  26. 26.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  27. 27.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
  29. 29.True or false: a comb is needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a battery cell (d) water
  31. 31.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) water (d) white paper strips
  34. 34.🫧 Which of these is a base? (a) lemon juice (b) curd (c) baking soda water (d) orange juice
  35. 35.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it turns blue (d) it disappears
  36. 36.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  37. 37.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) tamarind water (d) baking soda water
  38. 38.🫧 Which of these is neutral? (a) plain water (b) curd (c) orange juice (d) vinegar
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  40. 40.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) plain water (c) sugar water (d) lemon juice

Answer key

  1. vinegar
  2. the liquid we test
  3. stays yellow
  4. stays yellow
  5. turns reddish-brown
  6. False
  7. True
  8. stays yellow
  9. False
  10. use only kitchen items
  11. True
  12. needed
  13. water
  14. soap solution
  15. False
  16. baking soda water
  17. sugar water
  18. an indicator
  19. the number of drops
  20. not needed
  21. False
  22. False
  23. False
  24. salt water
  25. plain water
  26. not needed
  27. an acid
  28. soap water is a base
  29. False
  30. a battery cell
  31. True
  32. we keep it the same
  33. a magnet
  34. baking soda water
  35. it turns yellow again
  36. neutral
  37. baking soda water
  38. plain water
  39. False
  40. soap solution

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