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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 381 · 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.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) a magnet (d) an indicator
  3. 3.True or false: plain water is neutral. (a) False (b) True
  4. 4.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) lemon juice (d) sugar water
  5. 5.🧺 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 battery cell
  6. 6.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  8. 8.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  10. 10.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  11. 11.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) vinegar (d) tamarind water
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) lemon juice (c) a balloon (d) a magnet
  14. 14.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  16. 16.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the number of drops (d) the colour we see
  18. 18.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) salt water (d) sugar water
  20. 20.True or false: sugar water is neutral. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) baking soda water (d) detergent water
  22. 22.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) tamarind water (c) salt water (d) plain water
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) turmeric powder (d) yeast
  25. 25.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  26. 26.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a comb (d) a dropper or spoon
  28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
  29. 29.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  30. 30.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  31. 31.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  33. 33.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
  34. 34.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
  35. 35.⚖️ 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 change it (c) we keep it the same
  36. 36.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  37. 37.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) baking soda water (d) lemon juice
  39. 39.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  40. 40.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral

Answer key

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

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