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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 883 · 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.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) lemon juice (d) a mirror
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  5. 5.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  6. 6.⚖️ 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 keep it the same (c) we measure it
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the turmeric paper
  8. 8.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) salt water (c) baking soda water (d) lemon juice
  9. 9.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  11. 11.🔮 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
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  13. 13.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  14. 14.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  15. 15.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a battery cell (d) water
  16. 16.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a battery cell (c) white paper strips (d) lemon juice
  18. 18.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  19. 19.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  20. 20.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  21. 21.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a mirror (d) white paper strips
  23. 23.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a magnet (d) soap solution
  24. 24.True or false: a comb is needed for the turmeric test. (a) True (b) False
  25. 25.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a battery cell (d) a magnet
  26. 26.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  27. 27.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) lemon juice (d) yeast
  29. 29.True or false: soap solution is a base. (a) False (b) True
  30. 30.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  32. 32.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) lemon juice (d) tamarind water
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) your best clothes (d) an old shirt or apron
  34. 34.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  35. 35.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
  37. 37.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  39. 39.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  40. 40.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water

Answer key

  1. a base
  2. a mirror
  3. False
  4. lemon juice
  5. True
  6. we keep it the same
  7. the colour we see
  8. baking soda water
  9. it stays yellow
  10. reddish
  11. reddish-brown
  12. the number of drops
  13. an acid
  14. not needed
  15. a battery cell
  16. needed
  17. a battery cell
  18. vinegar
  19. True
  20. needed
  21. stays yellow
  22. a mirror
  23. a magnet
  24. False
  25. soap solution
  26. neutral
  27. a base
  28. lemon juice
  29. True
  30. False
  31. True
  32. soap solution
  33. an old shirt or apron
  34. not needed
  35. turns reddish-brown
  36. it turns yellow again
  37. stays yellow
  38. True
  39. an indicator
  40. vinegar

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