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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 259 · 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.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  2. 2.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  3. 3.🔍 Which is the odd one out? (a) baking soda water (b) plain water (c) lemon juice (d) sugar water
  4. 4.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  5. 5.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
  8. 8.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  9. 9.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  11. 11.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) turmeric powder (d) a mirror
  12. 12.True or false: lemon juice is a base. (a) False (b) True
  13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
  14. 14.🔮 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
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the number of drops
  16. 16.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
  19. 19.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) salt water (d) vinegar
  20. 20.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  21. 21.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) lemon juice (d) sugar water
  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) turmeric powder (d) soap solution
  24. 24.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
  25. 25.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
  26. 26.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  27. 27.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) tamarind water (d) lemon juice
  28. 28.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  29. 29.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  30. 30.🫧 Which of these is a base? (a) lemon juice (b) curd (c) sugar water (d) detergent water
  31. 31.True or false: plain water is neutral. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) lemon juice (d) tamarind water
  33. 33.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) sugar water
  34. 34.True or false: vinegar is neutral. (a) False (b) True
  35. 35.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) tamarind water (d) salt water
  36. 36.True or false: baking soda water is a base. (a) True (b) False
  37. 37.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) yeast
  40. 40.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow

Answer key

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

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