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Turmeric Indicator Experiment Worksheet

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

Answer key

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

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