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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 777 · 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: orange juice is a base. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) turmeric powder (d) yeast
  3. 3.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  4. 4.🫧 Which of these is an acid? (a) salt water (b) plain water (c) baking soda water (d) vinegar
  5. 5.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) detergent water (d) sugar water
  6. 6.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  7. 7.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  8. 8.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns yellow again (d) it turns darker red
  10. 10.⚖️ 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 measure it (c) we keep it the same
  11. 11.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  12. 12.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) soap solution (d) water
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) baking soda water (d) plain water
  15. 15.True or false: vinegar is an acid. (a) True (b) False
  16. 16.True or false: a comb is needed for the turmeric test. (a) True (b) False
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) yeast (c) lemon juice (d) water
  18. 18.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  20. 20.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) salt water (c) sugar water (d) plain water
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a magnet (d) a dropper or spoon
  25. 25.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  26. 26.True or false: water is not needed for the turmeric test. (a) False (b) True
  27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  29. 29.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  30. 30.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) water (c) lemon juice (d) a dropper or spoon
  34. 34.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
  35. 35.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  36. 36.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) turmeric powder (d) white paper strips
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a comb (c) soap solution (d) water
  39. 39.True or false: tamarind water is an acid. (a) False (b) True
  40. 40.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base

Answer key

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

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