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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 328 · 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.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  2. 2.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  4. 4.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) sugar water (c) salt water (d) lemon juice
  5. 5.True or false: water is needed for the turmeric test. (a) True (b) False
  6. 6.True or false: plain water is a base. (a) False (b) True
  7. 7.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) a magnet
  9. 9.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) soap solution (d) a magnet
  12. 12.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) a prism (d) an indicator
  13. 13.🫧 Which of these is neutral? (a) plain water (b) orange juice (c) curd (d) baking soda water
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  15. 15.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  16. 16.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water
  17. 17.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  18. 18.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
  21. 21.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) plain water (d) soap solution
  23. 23.🔍 Which is the odd one out? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  25. 25.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  26. 26.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a dropper or spoon (d) a balloon
  28. 28.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  29. 29.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  30. 30.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  31. 31.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns blue (d) it turns green
  33. 33.True or false: salt water is neutral. (a) False (b) True
  34. 34.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  35. 35.True or false: sugar water is a base. (a) True (b) False
  36. 36.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) soap solution (d) yeast
  37. 37.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  38. 38.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  39. 39.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) turmeric powder (d) water

Answer key

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

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