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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 994 · 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 light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  2. 2.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  3. 3.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
  4. 4.🫧 Which of these is a base? (a) baking soda water (b) orange juice (c) lemon juice (d) curd
  5. 5.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  6. 6.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
  7. 7.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) a dropper or spoon (d) water
  9. 9.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
  11. 11.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  12. 12.True or false: tamarind water is an acid. (a) False (b) True
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a magnet (c) turmeric powder (d) water
  14. 14.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  15. 15.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  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 turmeric paper (c) the colour we see
  18. 18.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
  19. 19.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  20. 20.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🫧 Which of these is neutral? (a) soap solution (b) curd (c) orange juice (d) plain water
  22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  24. 24.True or false: a comb is needed for the turmeric test. (a) True (b) False
  25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
  26. 26.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  27. 27.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the light we look in (d) the colour we see
  30. 30.🫧 Which of these is an acid? (a) salt water (b) tamarind water (c) soap solution (d) baking soda water
  31. 31.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) a pulley (d) an indicator
  32. 32.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🫧 Which of these is an acid? (a) plain water (b) orange juice (c) salt water (d) soap solution
  34. 34.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  35. 35.True or false: detergent water is a base. (a) True (b) False
  36. 36.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  37. 37.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a mirror (d) yeast
  38. 38.🫧 Which of these is a base? (a) curd (b) detergent water (c) plain water (d) salt water
  39. 39.True or false: vinegar is an acid. (a) False (b) True
  40. 40.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again

Answer key

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

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