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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 405 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) a dropper or spoon (d) water
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  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.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  5. 5.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  6. 6.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  7. 7.True or false: curd is a base. (a) True (b) False
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the number of drops
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  10. 10.True or false: lemon juice is neutral. (a) True (b) False
  11. 11.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  12. 12.🫧 Which of these is neutral? (a) baking soda water (b) plain water (c) detergent water (d) tamarind water
  13. 13.⚖️ 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
  14. 14.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
  15. 15.🍋 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
  16. 16.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) it stays white (d) reddish-brown
  17. 17.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) tamarind water (d) plain water
  18. 18.True or false: orange juice is a base. (a) False (b) True
  19. 19.True or false: lemon juice is an acid. (a) True (b) False
  20. 20.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  22. 22.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  23. 23.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) tamarind water (d) sugar water
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) white paper strips (d) a mirror
  25. 25.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a comb (c) a balloon (d) a magnet
  26. 26.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  27. 27.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  29. 29.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.🫧 Which of these is an acid? (a) tamarind water (b) baking soda water (c) sugar water (d) plain water
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) water (d) a balloon
  32. 32.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) plain water (d) salt water
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  34. 34.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  35. 35.True or false: vinegar is an acid. (a) True (b) False
  36. 36.🧺 Which of these is needed for the turmeric test? (a) a comb (b) white paper strips (c) yeast (d) a balloon
  37. 37.🧺 Which of these is needed for the turmeric test? (a) water (b) a balloon (c) a battery cell (d) a magnet
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  39. 39.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green

Answer key

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

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