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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 237 · 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.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  2. 2.True or false: baking soda water is a base. (a) False (b) True
  3. 3.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  4. 4.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) a mirror (d) turmeric powder
  5. 5.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
  6. 6.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice
  8. 8.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) salt water (d) detergent water
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a magnet (d) lemon juice
  10. 10.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
  11. 11.⚖️ 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 measure it (c) we change it
  12. 12.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) soap solution (d) lemon juice
  13. 13.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  14. 14.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  15. 15.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) tamarind water (d) baking soda water
  16. 16.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) water (d) turmeric powder
  18. 18.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  19. 19.True or false: vinegar is a base. (a) True (b) False
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) a battery cell (d) a comb
  21. 21.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) soap solution (d) tamarind water
  22. 22.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the colour we see
  24. 24.True or false: plain water is neutral. (a) True (b) False
  25. 25.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  26. 26.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  27. 27.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.🟡 Which of these keeps turmeric yellow? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the turmeric paper (d) the light we look in
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  31. 31.True or false: tamarind water is neutral. (a) True (b) False
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  34. 34.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  35. 35.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  37. 37.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a prism (d) a pulley
  38. 38.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False

Answer key

  1. False
  2. True
  3. it stays yellow
  4. turmeric powder
  5. vinegar
  6. stays yellow
  7. soap solution
  8. detergent water
  9. a magnet
  10. an old shirt or apron
  11. we keep it the same
  12. lemon juice
  13. stays yellow
  14. False
  15. tamarind water
  16. salt water
  17. a mirror
  18. reddish-brown
  19. False
  20. water
  21. soap solution
  22. reddish
  23. the colour we see
  24. True
  25. True
  26. a base
  27. stays yellow
  28. salt water
  29. the liquid we test
  30. False
  31. False
  32. a base
  33. we keep it the same
  34. neutral
  35. turns reddish-brown
  36. False
  37. an indicator
  38. turns reddish-brown
  39. True
  40. True

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