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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 922 · 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: soap solution turns turmeric reddish-brown. (a) False (b) True
  2. 2.True or false: water is not needed for the turmeric test. (a) False (b) True
  3. 3.⚖️ 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
  4. 4.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  5. 5.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
  6. 6.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a balloon (d) water
  8. 8.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) lemon juice (d) plain water
  9. 9.True or false: salt water is an acid. (a) False (b) True
  10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
  11. 11.🛟 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
  12. 12.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) lemon juice (d) sugar water
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  14. 14.⚖️ 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 liquid we test (c) the turmeric paper (d) the colour we see
  15. 15.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) a comb (d) soap solution
  16. 16.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  17. 17.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  18. 18.⚖️ 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
  19. 19.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  20. 20.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  21. 21.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  22. 22.⚖️ 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
  23. 23.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  25. 25.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) soap solution (d) orange juice
  26. 26.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  27. 27.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) sugar water (d) lemon juice
  30. 30.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  32. 32.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  33. 33.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  34. 34.True or false: lemon juice is a base. (a) False (b) True
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a battery cell (d) water
  36. 36.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  39. 39.True or false: lemon juice is an acid. (a) True (b) False
  40. 40.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral

Answer key

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

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