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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 624 · 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: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  2. 2.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  3. 3.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
  5. 5.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) detergent water (d) sugar water
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  7. 7.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is magnetic (d) soap is hot
  8. 8.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  10. 10.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) tamarind water (d) baking soda water
  11. 11.🫧 Which of these is neutral? (a) detergent water (b) soap solution (c) salt water (d) lemon juice
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  13. 13.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  15. 15.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
  16. 16.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) a mirror (d) a dropper or spoon
  18. 18.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) detergent water (d) plain water
  19. 19.True or false: a comb is needed for the turmeric test. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  21. 21.🍋 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
  22. 22.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  23. 23.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  24. 24.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  25. 25.🫧 Which of these is neutral? (a) detergent water (b) lemon juice (c) plain water (d) soap solution
  26. 26.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.⚖️ 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
  28. 28.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) orange juice (d) plain water
  29. 29.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  31. 31.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
  34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  35. 35.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  37. 37.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) an indicator (d) a prism
  38. 38.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  39. 39.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  40. 40.🫧 Which of these is an acid? (a) baking soda water (b) vinegar (c) sugar water (d) soap solution

Answer key

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

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