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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 254 · 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.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) sugar water (d) detergent water
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the turmeric paper (d) the colour we see
  3. 3.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
  5. 5.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  7. 7.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  8. 8.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) tamarind water (d) baking soda water
  10. 10.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  11. 11.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
  12. 12.🫧 Which of these is a base? (a) lemon juice (b) plain water (c) tamarind water (d) soap solution
  13. 13.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a pulley (d) a magnet
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  15. 15.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  17. 17.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) soap solution (d) a balloon
  19. 19.🫧 Which of these is a base? (a) lemon juice (b) curd (c) orange juice (d) detergent water
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
  22. 22.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  23. 23.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  25. 25.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  26. 26.True or false: baking soda water is neutral. (a) True (b) False
  27. 27.True or false: vinegar is neutral. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  29. 29.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) water (d) a balloon
  31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  33. 33.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  35. 35.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) lemon juice (c) soap solution (d) water
  38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
  39. 39.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  40. 40.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed

Answer key

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

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