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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 699 · 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 neutral? (a) lemon juice (b) detergent water (c) orange juice (d) salt water
  2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
  3. 3.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  4. 4.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  5. 5.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  8. 8.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  9. 9.🛟 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
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a mirror (c) turmeric powder (d) water
  12. 12.True or false: salt water keeps turmeric yellow. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  14. 14.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  15. 15.⚖️ 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 turmeric paper (d) the number of drops
  16. 16.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  17. 17.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a prism (d) a pulley
  18. 18.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  19. 19.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  20. 20.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  22. 22.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  23. 23.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) soap solution (d) plain water
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) yeast (d) water
  25. 25.🫧 Which of these is a base? (a) lemon juice (b) baking soda water (c) tamarind water (d) curd
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  27. 27.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  28. 28.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) salt water (d) vinegar
  29. 29.True or false: detergent water is neutral. (a) True (b) False
  30. 30.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) detergent water (d) baking soda water
  31. 31.True or false: tamarind water is an acid. (a) False (b) True
  32. 32.🛟 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
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a magnet (c) soap solution (d) water
  34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
  35. 35.True or false: water is not needed for the turmeric test. (a) True (b) False
  36. 36.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) turmeric powder (d) water
  38. 38.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  39. 39.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  40. 40.True or false: plain water is neutral. (a) True (b) False

Answer key

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

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