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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 134 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) a balloon (d) lemon juice
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) salt water
  4. 4.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test
  8. 8.True or false: detergent water is an acid. (a) True (b) False
  9. 9.🫧 Which of these is neutral? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  12. 12.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the turmeric paper (d) the number of drops
  14. 14.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  15. 15.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a mirror (d) water
  16. 16.📘 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
  17. 17.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  18. 18.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
  20. 20.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  21. 21.🫧 Which of these is a base? (a) vinegar (b) lemon juice (c) plain water (d) soap solution
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  23. 23.True or false: sugar water is neutral. (a) False (b) True
  24. 24.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  25. 25.🫧 Which of these is a base? (a) curd (b) lemon juice (c) sugar water (d) baking soda water
  26. 26.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) detergent water (d) tamarind water
  28. 28.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  29. 29.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  31. 31.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  32. 32.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) a balloon (d) yeast
  35. 35.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) turmeric powder (d) lemon juice
  37. 37.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a mirror
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) yeast (d) lemon juice
  40. 40.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a dropper or spoon (c) a mirror (d) a magnet

Answer key

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

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