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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 630 · 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: lemon juice is an acid. (a) False (b) True
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) yeast (c) water (d) turmeric powder
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
  4. 4.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.True or false: sugar water is neutral. (a) False (b) True
  6. 6.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: detergent water is a base. (a) False (b) True
  8. 8.⚖️ 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 liquid we test (d) the turmeric paper
  9. 9.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  10. 10.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  11. 11.True or false: lemon juice is a base. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  14. 14.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) soap solution (c) a mirror (d) yeast
  15. 15.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) a magnet (d) white paper strips
  16. 16.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  17. 17.⚖️ 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
  18. 18.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) plain water
  20. 20.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) yeast
  22. 22.⚖️ 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
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  24. 24.True or false: tamarind water is neutral. (a) False (b) True
  25. 25.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  27. 27.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  28. 28.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
  29. 29.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
  30. 30.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) lemon juice (d) water
  32. 32.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  35. 35.🫧 Which of these is an acid? (a) baking soda water (b) tamarind water (c) soap solution (d) plain water
  36. 36.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
  37. 37.🫧 Which of these is a base? (a) detergent water (b) orange juice (c) vinegar (d) tamarind water
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  39. 39.🧺 Which of these is needed for the turmeric test? (a) yeast (b) white paper strips (c) a comb (d) a balloon
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False

Answer key

  1. True
  2. yeast
  3. use only kitchen items
  4. turns reddish-brown
  5. True
  6. not needed
  7. True
  8. the liquid we test
  9. True
  10. False
  11. False
  12. False
  13. True
  14. soap solution
  15. a magnet
  16. True
  17. False
  18. True
  19. soap solution
  20. False
  21. yeast
  22. False
  23. we measure it
  24. False
  25. needed
  26. it stays yellow
  27. reddish-brown
  28. salt water
  29. it turns yellow again
  30. False
  31. a mirror
  32. needed
  33. a base
  34. True
  35. tamarind water
  36. an indicator
  37. detergent water
  38. we change it
  39. white paper strips
  40. False

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