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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 703 · 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.

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

Answer key

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

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