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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 256 · 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: detergent water keeps turmeric yellow. (a) False (b) True
  2. 2.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) soap solution (d) curd
  3. 3.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) tamarind water
  4. 4.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  5. 5.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  7. 7.True or false: soap solution is neutral. (a) False (b) True
  8. 8.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  9. 9.⚖️ 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 colour we see (c) the turmeric paper (d) the liquid we test
  10. 10.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  11. 11.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) vinegar (d) detergent water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) white paper strips (d) lemon juice
  14. 14.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) baking soda water (d) salt water
  16. 16.True or false: detergent water is neutral. (a) False (b) True
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) sugar water (d) tamarind water
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a dropper or spoon (d) a mirror
  20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
  21. 21.🛟 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
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) a mirror (d) turmeric powder
  23. 23.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
  24. 24.🫧 Which of these is a base? (a) baking soda water (b) sugar water (c) curd (d) lemon juice
  25. 25.True or false: a comb is needed for the turmeric test. (a) True (b) False
  26. 26.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  27. 27.True or false: curd is an acid. (a) False (b) True
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) white paper strips (d) a comb
  29. 29.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  31. 31.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  32. 32.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) turmeric powder (d) white paper strips
  34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  36. 36.True or false: sugar water is an acid. (a) True (b) False
  37. 37.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) salt water (d) detergent water
  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.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  40. 40.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) orange juice (d) baking soda water

Answer key

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

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