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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 213 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  2. 2.🫧 Which of these is a base? (a) salt water (b) baking soda water (c) vinegar (d) lemon juice
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  4. 4.⚖️ 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
  5. 5.⚖️ 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 turmeric paper (d) the light we look in
  6. 6.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  8. 8.True or false: baking soda water is neutral. (a) True (b) False
  9. 9.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  11. 11.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  12. 12.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  14. 14.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  16. 16.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) lemon juice (d) sugar water
  17. 17.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  18. 18.⚖️ 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
  19. 19.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) sugar water (c) plain water (d) vinegar
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a mirror (d) soap solution
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a balloon (d) soap solution
  23. 23.True or false: plain water is neutral. (a) True (b) False
  24. 24.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  25. 25.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  27. 27.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  29. 29.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  31. 31.True or false: salt water is neutral. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
  33. 33.True or false: water is needed for the turmeric test. (a) True (b) False
  34. 34.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  35. 35.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  36. 36.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  37. 37.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  39. 39.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a mirror (d) turmeric powder

Answer key

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

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