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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 744 · 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: sugar water keeps turmeric yellow. (a) True (b) False
  2. 2.True or false: water is not needed for the turmeric test. (a) True (b) False
  3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  7. 7.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  8. 8.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) water (d) soap solution
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) a mirror (d) turmeric powder
  11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  12. 12.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  13. 13.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  14. 14.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  15. 15.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  16. 16.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the colour we see
  18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is magnetic (d) soap is an acid
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) yeast (d) water
  20. 20.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  21. 21.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) a pulley (d) an indicator
  22. 22.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) salt water (d) detergent water
  23. 23.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a comb (b) water (c) a magnet (d) yeast
  25. 25.🫧 Which of these is a base? (a) orange juice (b) plain water (c) salt water (d) soap solution
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) sugar water (d) plain water
  27. 27.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  28. 28.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) turmeric powder (d) yeast
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) soap solution (d) a magnet
  31. 31.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) turmeric powder
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a comb (d) soap solution
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) a balloon (d) white paper strips
  37. 37.True or false: plain water keeps turmeric yellow. (a) False (b) True
  38. 38.🫧 Which of these is neutral? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  39. 39.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) baking soda water (d) plain water
  40. 40.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base

Answer key

  1. True
  2. False
  3. it stays yellow
  4. the turmeric paper
  5. an old shirt or apron
  6. False
  7. an acid
  8. use only kitchen items
  9. a comb
  10. a mirror
  11. reddish-brown
  12. needed
  13. needed
  14. an acid
  15. a base
  16. neutral
  17. the colour we see
  18. soap water is a base
  19. yeast
  20. True
  21. an indicator
  22. detergent water
  23. True
  24. water
  25. soap solution
  26. soap solution
  27. needed
  28. False
  29. turmeric powder
  30. soap solution
  31. a base
  32. a battery cell
  33. a base
  34. a comb
  35. True
  36. a balloon
  37. True
  38. plain water
  39. baking soda water
  40. an acid

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