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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 743 · 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) turns reddish-brown (b) stays yellow
  2. 2.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) lemon juice (d) curd
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) vinegar (c) plain water (d) baking soda water
  4. 4.🔮 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
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
  6. 6.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a battery cell (d) lemon juice
  8. 8.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  10. 10.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.🛟 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
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  13. 13.True or false: yeast is needed for the turmeric test. (a) True (b) False
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  15. 15.⚖️ 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
  16. 16.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  17. 17.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  18. 18.⚖️ 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 change it (c) we measure it
  19. 19.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.⚖️ 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
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) soap solution (d) a balloon
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) salt water (d) detergent water
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  25. 25.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  26. 26.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  27. 27.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a balloon (d) a comb
  28. 28.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  29. 29.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
  30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a battery cell (d) water
  32. 32.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) a pulley (d) an indicator
  33. 33.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  34. 34.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  35. 35.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
  36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.True or false: vinegar is an acid. (a) True (b) False
  38. 38.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  39. 39.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  40. 40.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) detergent water (d) lemon juice

Answer key

  1. stays yellow
  2. detergent water
  3. baking soda water
  4. it stays yellow
  5. reddish
  6. it turns yellow again
  7. lemon juice
  8. turns reddish-brown
  9. True
  10. an acid
  11. use only kitchen items
  12. True
  13. False
  14. True
  15. we change it
  16. a base
  17. sugar water
  18. we measure it
  19. stays yellow
  20. turns reddish-brown
  21. False
  22. a balloon
  23. detergent water
  24. False
  25. False
  26. False
  27. water
  28. True
  29. salt water
  30. reddish-brown
  31. a battery cell
  32. an indicator
  33. neutral
  34. False
  35. soap solution
  36. turns reddish-brown
  37. True
  38. False
  39. needed
  40. detergent water

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