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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 298 · 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: plain water is an acid. (a) True (b) False
  2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  3. 3.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  4. 4.True or false: vinegar is a base. (a) True (b) False
  5. 5.⚖️ 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 number of drops (c) the turmeric paper (d) the light we look in
  6. 6.True or false: plain water keeps turmeric yellow. (a) True (b) False
  7. 7.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) lemon juice (d) plain water
  8. 8.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  9. 9.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  10. 10.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  11. 11.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  12. 12.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  15. 15.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) turmeric powder (d) a battery cell
  16. 16.🫧 Which of these is neutral? (a) sugar water (b) soap solution (c) baking soda water (d) detergent water
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) water (d) soap solution
  18. 18.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  19. 19.🛟 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
  20. 20.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  21. 21.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) an indicator (d) a prism
  22. 22.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  23. 23.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) soap solution (d) a comb
  26. 26.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) turmeric powder (c) white paper strips (d) lemon juice
  28. 28.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) vinegar (d) lemon juice
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) lemon juice (d) detergent water
  30. 30.🛟 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
  31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
  32. 32.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) white paper strips (c) lemon juice (d) water
  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) plain water (c) salt water (d) orange juice
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  39. 39.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  40. 40.True or false: curd is a base. (a) False (b) True

Answer key

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

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