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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 276 · 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.⚖️ 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
  2. 2.True or false: plain water is a base. (a) False (b) True
  3. 3.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) salt water (d) baking soda water
  4. 4.True or false: tamarind water is an acid. (a) False (b) True
  5. 5.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) salt water (d) tamarind water
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) turmeric powder (d) a battery cell
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  9. 9.True or false: salt water is an acid. (a) True (b) False
  10. 10.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  11. 11.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  12. 12.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) tamarind water (d) soap solution
  13. 13.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  14. 14.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  15. 15.True or false: curd is a base. (a) True (b) False
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  17. 17.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) curd (d) plain water
  18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  19. 19.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  20. 20.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a prism (d) a magnet
  21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
  23. 23.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  24. 24.⚖️ 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
  25. 25.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  27. 27.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
  28. 28.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
  30. 30.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the number of drops (d) the colour we see
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  33. 33.⚖️ 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
  34. 34.True or false: plain water is neutral. (a) False (b) True
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  36. 36.⚖️ 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
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  38. 38.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) soap solution (d) detergent water
  39. 39.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True

Answer key

  1. we change it
  2. False
  3. baking soda water
  4. True
  5. True
  6. soap solution
  7. turmeric powder
  8. an old shirt or apron
  9. False
  10. False
  11. lemon juice
  12. soap solution
  13. neutral
  14. True
  15. False
  16. True
  17. baking soda water
  18. it stays yellow
  19. True
  20. an indicator
  21. vinegar
  22. soap solution
  23. a base
  24. False
  25. a base
  26. False
  27. it turns yellow again
  28. not needed
  29. reddish-brown
  30. False
  31. the liquid we test
  32. False
  33. the light we look in
  34. True
  35. True
  36. we keep it the same
  37. we keep it the same
  38. tamarind water
  39. vinegar
  40. True

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