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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 608 · 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) True (b) False
  2. 2.True or false: salt water is a base. (a) True (b) False
  3. 3.🫧 Which of these is neutral? (a) detergent water (b) vinegar (c) baking soda water (d) plain water
  4. 4.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  5. 5.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
  6. 6.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) plain water (d) vinegar
  7. 7.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  8. 8.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  9. 9.True or false: vinegar is an acid. (a) True (b) False
  10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) water (c) yeast (d) a mirror
  12. 12.🫧 Which of these is a base? (a) detergent water (b) sugar water (c) orange juice (d) salt water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) turmeric powder (d) lemon juice
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) a magnet
  15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a dropper or spoon (d) a magnet
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) salt water (d) baking soda water
  18. 18.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) soap solution (d) baking soda water
  19. 19.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  20. 20.True or false: orange juice is neutral. (a) False (b) True
  21. 21.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) white paper strips (d) a comb
  23. 23.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) vinegar (d) lemon juice
  24. 24.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) tamarind water (d) plain water
  25. 25.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a mirror (d) white paper strips
  27. 27.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  28. 28.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  29. 29.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  33. 33.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  34. 34.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  35. 35.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  36. 36.🫧 Which of these is a base? (a) salt water (b) curd (c) vinegar (d) soap solution
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  38. 38.True or false: plain water is neutral. (a) False (b) True
  39. 39.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  40. 40.🫧 Which of these is a base? (a) tamarind water (b) orange juice (c) sugar water (d) baking soda water

Answer key

  1. True
  2. False
  3. plain water
  4. not needed
  5. an indicator
  6. vinegar
  7. lemon juice
  8. an acid
  9. True
  10. it stays yellow
  11. water
  12. detergent water
  13. a mirror
  14. a magnet
  15. reddish
  16. a magnet
  17. baking soda water
  18. vinegar
  19. an acid
  20. False
  21. stays yellow
  22. a comb
  23. detergent water
  24. tamarind water
  25. not needed
  26. white paper strips
  27. an acid
  28. True
  29. use only kitchen items
  30. True
  31. True
  32. reddish-brown
  33. True
  34. True
  35. turns reddish-brown
  36. soap solution
  37. we measure it
  38. True
  39. False
  40. baking soda water

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