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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 942 · 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.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  3. 3.True or false: curd is a base. (a) False (b) True
  4. 4.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.True or false: salt water is an acid. (a) True (b) False
  6. 6.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) water (d) yeast
  7. 7.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  8. 8.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns yellow again (d) it turns darker red
  10. 10.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) plain water (d) tamarind water
  11. 11.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the number of drops
  14. 14.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  15. 15.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) a magnet (d) turmeric powder
  16. 16.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the light we look in
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  19. 19.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a prism (d) a pulley
  20. 20.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a magnet (c) water (d) a dropper or spoon
  24. 24.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  25. 25.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  27. 27.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  28. 28.🫧 Which of these is a base? (a) tamarind water (b) vinegar (c) curd (d) baking soda water
  29. 29.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
  31. 31.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) yeast (c) lemon juice (d) turmeric powder
  33. 33.True or false: salt water keeps turmeric yellow. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  36. 36.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a battery cell (d) a comb
  37. 37.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a comb (c) a magnet (d) a balloon
  38. 38.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  39. 39.⚖️ 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
  40. 40.True or false: lemon juice is needed for the turmeric test. (a) False (b) True

Answer key

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

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