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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 830 · 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 not needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) lemon juice
  2. 2.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  4. 4.⚖️ 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
  5. 5.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a balloon (d) lemon juice
  6. 6.🫧 Which of these is a base? (a) plain water (b) orange juice (c) lemon juice (d) soap solution
  7. 7.🛟 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
  8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  9. 9.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  10. 10.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  11. 11.⚖️ 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 liquid we test (d) the colour we see
  12. 12.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  13. 13.True or false: orange juice is a base. (a) True (b) False
  14. 14.🫧 Which of these is a base? (a) lemon juice (b) vinegar (c) baking soda water (d) orange juice
  15. 15.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) baking soda water (c) tamarind water (d) plain water
  17. 17.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  18. 18.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) water (d) soap solution
  21. 21.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) vinegar (d) sugar water
  22. 22.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  23. 23.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  24. 24.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  25. 25.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) soap solution (d) yeast
  26. 26.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) salt water (d) detergent water
  30. 30.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
  31. 31.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
  34. 34.🫧 Which of these is neutral? (a) baking soda water (b) orange juice (c) vinegar (d) sugar water
  35. 35.⚖️ 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
  36. 36.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  37. 37.True or false: vinegar is an acid. (a) True (b) False
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) a dropper or spoon (c) lemon juice (d) turmeric powder
  39. 39.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a comb (d) a battery cell
  40. 40.True or false: vinegar is a base. (a) False (b) True

Answer key

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

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