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Turmeric Indicator Experiment Worksheet

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

Answer key

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

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