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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 430 · 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 soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
  3. 3.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  4. 4.True or false: salt water is an acid. (a) True (b) False
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  6. 6.⚖️ 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 colour we see (c) the turmeric paper (d) the liquid we test
  7. 7.True or false: salt water is neutral. (a) False (b) True
  8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  9. 9.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) lemon juice (d) tamarind water
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) lemon juice (d) a battery cell
  11. 11.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) a magnet (d) lemon juice
  12. 12.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  13. 13.🫧 Which of these is a base? (a) orange juice (b) tamarind water (c) salt water (d) baking soda water
  14. 14.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) white paper strips (d) lemon juice
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) white paper strips (d) a mirror
  17. 17.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  18. 18.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  19. 19.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a comb (c) white paper strips (d) a dropper or spoon
  21. 21.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) water (b) yeast (c) a dropper or spoon (d) turmeric powder
  23. 23.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  25. 25.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  26. 26.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  27. 27.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  28. 28.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  30. 30.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
  31. 31.⚖️ 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
  32. 32.True or false: sugar water is neutral. (a) True (b) False
  33. 33.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  35. 35.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) vinegar (d) salt water
  36. 36.⚖️ 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
  37. 37.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  38. 38.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it turns darker red (d) it disappears
  39. 39.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) a magnet (d) an indicator
  40. 40.True or false: plain water is an acid. (a) True (b) False

Answer key

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

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