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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 500 · 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.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a dropper or spoon (d) a balloon
  3. 3.True or false: orange juice is a base. (a) False (b) True
  4. 4.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  5. 5.True or false: soap solution is neutral. (a) True (b) False
  6. 6.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  8. 8.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  10. 10.🍋 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
  11. 11.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  12. 12.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  14. 14.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) vinegar (d) detergent water
  15. 15.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) sugar water
  16. 16.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  18. 18.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a pulley (d) a prism
  19. 19.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) water (c) soap solution (d) turmeric powder
  20. 20.True or false: sugar water is an acid. (a) True (b) False
  21. 21.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) soap solution (d) turmeric powder
  23. 23.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  24. 24.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  25. 25.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the colour we see
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  30. 30.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  31. 31.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
  33. 33.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  34. 34.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
  35. 35.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) vinegar (c) lemon juice (d) salt water
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  37. 37.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  38. 38.⚖️ 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
  39. 39.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) soap solution (d) a mirror

Answer key

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

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