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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 663 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  2. 2.🫧 Which of these is neutral? (a) baking soda water (b) soap solution (c) vinegar (d) salt water
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the light we look in
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) turmeric powder (d) yeast
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  6. 6.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) sugar water (d) lemon juice
  7. 7.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  8. 8.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) turmeric powder (d) a battery cell
  10. 10.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a balloon (c) a dropper or spoon (d) white paper strips
  13. 13.True or false: salt water is neutral. (a) True (b) False
  14. 14.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  15. 15.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  16. 16.True or false: plain water is neutral. (a) False (b) True
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) salt water (d) baking soda water
  18. 18.⚖️ 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 liquid we test (c) the light we look in (d) the colour we see
  19. 19.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  20. 20.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) sugar water (d) plain water
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) yeast (d) white paper strips
  23. 23.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  25. 25.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  27. 27.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  29. 29.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  30. 30.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
  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? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) water (c) turmeric powder (d) a dropper or spoon
  36. 36.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  37. 37.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  38. 38.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  40. 40.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution

Answer key

  1. reddish
  2. salt water
  3. the colour we see
  4. yeast
  5. we keep it the same
  6. detergent water
  7. False
  8. use only kitchen items
  9. a battery cell
  10. stays yellow
  11. an old shirt or apron
  12. a balloon
  13. True
  14. neutral
  15. False
  16. True
  17. baking soda water
  18. the liquid we test
  19. vinegar
  20. True
  21. soap solution
  22. white paper strips
  23. stays yellow
  24. we keep it the same
  25. True
  26. we keep it the same
  27. not needed
  28. True
  29. False
  30. stays yellow
  31. turns reddish-brown
  32. salt water
  33. True
  34. the light we look in
  35. a balloon
  36. an acid
  37. True
  38. turns reddish-brown
  39. needed
  40. tamarind water

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