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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 779 · 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 is a base. (a) True (b) False
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.True or false: baking soda water is a base. (a) False (b) True
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) baking soda water (c) tamarind water (d) sugar water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  8. 8.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  9. 9.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) soap solution (d) salt water
  10. 10.True or false: detergent water is neutral. (a) True (b) False
  11. 11.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  12. 12.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
  14. 14.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  15. 15.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  17. 17.⚖️ 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
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) soap solution (d) a battery cell
  19. 19.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a dropper or spoon (c) a balloon (d) a magnet
  21. 21.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  22. 22.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  23. 23.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.🫧 Which of these is neutral? (a) lemon juice (b) soap solution (c) tamarind water (d) plain water
  25. 25.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  27. 27.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the number of drops
  29. 29.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) lemon juice (d) plain water
  30. 30.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a balloon (c) yeast (d) a magnet
  31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  33. 33.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) yeast (d) turmeric powder
  35. 35.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  36. 36.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  38. 38.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  39. 39.⚖️ 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 keep it the same (c) we change it
  40. 40.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base

Answer key

  1. False
  2. reddish-brown
  3. turns reddish-brown
  4. True
  5. the light we look in
  6. baking soda water
  7. True
  8. an acid
  9. soap solution
  10. False
  11. reddish
  12. True
  13. it stays yellow
  14. False
  15. stays yellow
  16. an acid
  17. True
  18. a battery cell
  19. stays yellow
  20. a dropper or spoon
  21. False
  22. not needed
  23. turns reddish-brown
  24. plain water
  25. it stays yellow
  26. False
  27. True
  28. the liquid we test
  29. lemon juice
  30. white paper strips
  31. stays yellow
  32. False
  33. True
  34. turmeric powder
  35. needed
  36. True
  37. True
  38. use only kitchen items
  39. we keep it the same
  40. soap water is a base

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