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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 434 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  3. 3.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.True or false: detergent water is an acid. (a) True (b) False
  5. 5.🫧 Which of these is a base? (a) salt water (b) baking soda water (c) lemon juice (d) vinegar
  6. 6.🫧 Which of these is neutral? (a) sugar water (b) baking soda water (c) soap solution (d) tamarind water
  7. 7.True or false: baking soda water is neutral. (a) False (b) True
  8. 8.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) sugar water (d) soap solution
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) tamarind water (d) baking soda water
  11. 11.True or false: lemon juice is an acid. (a) False (b) True
  12. 12.⚖️ 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 number of drops (c) the liquid we test (d) the turmeric paper
  13. 13.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) lemon juice (d) salt water
  14. 14.True or false: detergent water is a base. (a) False (b) True
  15. 15.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
  16. 16.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  18. 18.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  19. 19.⚖️ 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
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) water (d) a dropper or spoon
  21. 21.True or false: water is not needed for the turmeric test. (a) False (b) True
  22. 22.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) a dropper or spoon (c) water (d) lemon juice
  24. 24.⚖️ 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
  25. 25.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  29. 29.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  30. 30.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
  32. 32.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  33. 33.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) soap solution (d) salt water
  34. 34.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  35. 35.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
  38. 38.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  39. 39.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) water (c) a comb (d) a magnet
  40. 40.True or false: soap solution keeps turmeric yellow. (a) True (b) False

Answer key

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

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