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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 629 · 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: curd is an acid. (a) False (b) True
  2. 2.⚖️ 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
  3. 3.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  4. 4.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  5. 5.True or false: lemon juice is neutral. (a) False (b) True
  6. 6.True or false: water is needed for the turmeric test. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) soap solution (d) turmeric powder
  9. 9.True or false: detergent water is neutral. (a) True (b) False
  10. 10.🔮 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
  11. 11.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) sugar water (d) lemon juice
  12. 12.True or false: salt water is an acid. (a) True (b) False
  13. 13.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  14. 14.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
  19. 19.True or false: soap solution is a base. (a) True (b) False
  20. 20.⚖️ 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 light we look in (d) the number of drops
  21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a comb (d) a dropper or spoon
  23. 23.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  24. 24.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  25. 25.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
  31. 31.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  32. 32.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  34. 34.⚖️ 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
  35. 35.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  36. 36.🛟 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
  37. 37.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) salt water (d) detergent water
  38. 38.⚖️ 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
  39. 39.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  40. 40.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) plain water

Answer key

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

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