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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 508 · 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.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  2. 2.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
  5. 5.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  6. 6.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  7. 7.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  8. 8.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  9. 9.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  11. 11.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) lemon juice
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a mirror (d) white paper strips
  13. 13.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  14. 14.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  15. 15.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a pulley (d) a prism
  16. 16.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  17. 17.⚖️ 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
  18. 18.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  20. 20.🫧 Which of these is an acid? (a) lemon juice (b) baking soda water (c) salt water (d) detergent water
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  23. 23.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  24. 24.🟡 Which of these keeps turmeric yellow? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  25. 25.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) yeast
  27. 27.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  28. 28.True or false: water is not needed for the turmeric test. (a) False (b) True
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) water (d) yeast
  30. 30.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) lemon juice (d) tamarind water
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  34. 34.⚖️ 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 light we look in
  35. 35.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  37. 37.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) salt water (d) sugar water
  39. 39.🫧 Which of these is neutral? (a) lemon juice (b) vinegar (c) sugar water (d) curd
  40. 40.True or false: vinegar is a base. (a) False (b) True

Answer key

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

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