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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 947 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  2. 2.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) detergent water (d) curd
  3. 3.⚖️ 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
  4. 4.🔮 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
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  6. 6.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  7. 7.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  8. 8.🔍 Which is the odd one out? (a) vinegar (b) sugar water (c) tamarind water (d) soap solution
  9. 9.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the number of drops (d) the liquid we test
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  12. 12.🫧 Which of these is neutral? (a) detergent water (b) tamarind water (c) plain water (d) vinegar
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  14. 14.⚖️ 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 liquid we test (d) the light we look in
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) water (d) lemon juice
  16. 16.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a pulley (d) a prism
  17. 17.True or false: curd is a base. (a) True (b) False
  18. 18.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  20. 20.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  21. 21.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  22. 22.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) soap solution (c) a comb (d) a balloon
  25. 25.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  26. 26.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  27. 27.True or false: plain water is a base. (a) False (b) True
  28. 28.True or false: vinegar is an acid. (a) False (b) True
  29. 29.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  30. 30.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  31. 31.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) reddish-brown (d) bright blue
  32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
  33. 33.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  34. 34.True or false: plain water is an acid. (a) True (b) False
  35. 35.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  36. 36.True or false: lemon juice is an acid. (a) False (b) True
  37. 37.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  39. 39.True or false: vinegar is a base. (a) False (b) True
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False

Answer key

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

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