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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 454 · 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.

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  1. 1.🍋 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
  2. 2.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  3. 3.⚖️ 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
  4. 4.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  8. 8.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) baking soda water (d) vinegar
  10. 10.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  11. 11.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  12. 12.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) detergent water (d) lemon juice
  13. 13.⚖️ 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 keep it the same (c) we change it
  14. 14.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) detergent water (d) orange juice
  16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  18. 18.True or false: detergent water is a base. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
  21. 21.True or false: a comb is needed for the turmeric test. (a) True (b) False
  22. 22.True or false: soap solution is neutral. (a) False (b) True
  23. 23.True or false: baking soda water is an acid. (a) False (b) True
  24. 24.🫧 Which of these is a base? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  25. 25.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.🔮 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
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the turmeric paper
  28. 28.True or false: yeast is needed for the turmeric test. (a) True (b) False
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) white paper strips (c) turmeric powder (d) water
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) tamarind water (d) salt water
  31. 31.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  32. 32.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) water (b) a mirror (c) a dropper or spoon (d) turmeric powder
  34. 34.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  35. 35.True or false: baking soda water is a base. (a) False (b) True
  36. 36.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  37. 37.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) tamarind water (d) salt water
  38. 38.⚖️ 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
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  40. 40.True or false: salt water is neutral. (a) True (b) False

Answer key

  1. it turns yellow again
  2. reddish-brown
  3. we keep it the same
  4. stays yellow
  5. soap solution
  6. reddish-brown
  7. True
  8. False
  9. baking soda water
  10. plain water
  11. needed
  12. lemon juice
  13. we keep it the same
  14. stays yellow
  15. detergent water
  16. it stays yellow
  17. stays yellow
  18. True
  19. sugar water
  20. an old shirt or apron
  21. False
  22. False
  23. False
  24. soap solution
  25. a base
  26. reddish
  27. the liquid we test
  28. False
  29. yeast
  30. soap solution
  31. lemon juice
  32. use only kitchen items
  33. a mirror
  34. a base
  35. True
  36. True
  37. tamarind water
  38. False
  39. we measure it
  40. True

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