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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 566 · 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 is an acid? (a) tamarind water (b) detergent water (c) soap solution (d) salt water
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) plain water (d) detergent water
  4. 4.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a balloon (c) soap solution (d) a dropper or spoon
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) white paper strips (c) soap solution (d) water
  7. 7.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  8. 8.⚖️ 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 colour we see (d) the number of drops
  9. 9.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  10. 10.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) curd (d) baking soda water
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  12. 12.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice
  13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  14. 14.True or false: lemon juice is neutral. (a) True (b) False
  15. 15.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  17. 17.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  18. 18.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  21. 21.True or false: salt water is neutral. (a) True (b) False
  22. 22.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  23. 23.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) soap solution (d) white paper strips
  25. 25.True or false: water is not needed for the turmeric test. (a) False (b) True
  26. 26.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  27. 27.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) salt water (d) baking soda water
  28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  30. 30.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  33. 33.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  34. 34.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) turmeric powder (d) a comb
  36. 36.True or false: vinegar is an acid. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) soap solution (d) baking soda water
  38. 38.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) plain water (d) vinegar
  39. 39.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
  40. 40.True or false: a battery cell is needed for the turmeric test. (a) True (b) False

Answer key

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

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