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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 126 · 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.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
  3. 3.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  4. 4.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  7. 7.🫧 Which of these is a base? (a) detergent water (b) tamarind water (c) curd (d) lemon juice
  8. 8.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  9. 9.True or false: soap solution is an acid. (a) True (b) False
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  11. 11.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) soap solution (d) yeast
  13. 13.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  14. 14.True or false: yeast is needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ 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 turmeric paper (c) the colour we see (d) the liquid we test
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
  17. 17.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a prism (d) a pulley
  19. 19.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
  20. 20.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  21. 21.True or false: plain water is neutral. (a) True (b) False
  22. 22.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  23. 23.True or false: baking soda water is an acid. (a) False (b) True
  24. 24.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  25. 25.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  26. 26.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  28. 28.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  29. 29.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) white paper strips (d) a mirror
  32. 32.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) a battery cell (d) a mirror
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the colour we see (d) the turmeric paper
  34. 34.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  35. 35.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) vinegar (d) lemon juice
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  38. 38.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  39. 39.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  40. 40.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) baking soda water (d) detergent water

Answer key

  1. an acid
  2. reddish-brown
  3. tamarind water
  4. stays yellow
  5. stays yellow
  6. an old shirt or apron
  7. detergent water
  8. a base
  9. False
  10. the turmeric paper
  11. False
  12. yeast
  13. an acid
  14. False
  15. the liquid we test
  16. False
  17. turns reddish-brown
  18. an indicator
  19. vinegar
  20. reddish
  21. True
  22. not needed
  23. False
  24. False
  25. not needed
  26. needed
  27. needed
  28. stays yellow
  29. False
  30. use only kitchen items
  31. a mirror
  32. a dropper or spoon
  33. the colour we see
  34. it stays yellow
  35. soap solution
  36. False
  37. True
  38. False
  39. a base
  40. plain water

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