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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 244 · 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.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  3. 3.🫧 Which of these is an acid? (a) curd (b) detergent water (c) baking soda water (d) plain water
  4. 4.🧺 Do we need a dropper or spoon 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) an indicator (b) a pulley (c) a magnet (d) a prism
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  7. 7.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) tamarind water (d) plain water
  8. 8.True or false: orange juice is a base. (a) True (b) False
  9. 9.True or false: water is needed for the turmeric test. (a) True (b) False
  10. 10.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) tamarind water (d) soap solution
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a comb (d) water
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) turmeric powder (d) yeast
  13. 13.True or false: salt water is a base. (a) True (b) False
  14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  15. 15.True or false: curd is neutral. (a) False (b) True
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) baking soda water (d) sugar water
  17. 17.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) plain water (d) soap solution
  18. 18.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  20. 20.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  21. 21.⚖️ 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
  22. 22.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  23. 23.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  24. 24.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  25. 25.🫧 Which of these is neutral? (a) detergent water (b) plain water (c) orange juice (d) soap solution
  26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a balloon (d) lemon juice
  28. 28.🫧 Which of these is a base? (a) salt water (b) lemon juice (c) sugar water (d) soap solution
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the light we look in
  30. 30.True or false: a comb is needed for the turmeric test. (a) True (b) False
  31. 31.True or false: lemon juice is a base. (a) True (b) False
  32. 32.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  33. 33.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  34. 34.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) salt water (d) detergent water
  35. 35.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  36. 36.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) lemon juice (d) a battery cell
  37. 37.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  38. 38.🔮 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
  39. 39.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
  40. 40.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

  1. stays yellow
  2. an old shirt or apron
  3. curd
  4. needed
  5. an indicator
  6. use only kitchen items
  7. tamarind water
  8. False
  9. True
  10. soap solution
  11. water
  12. yeast
  13. False
  14. reddish-brown
  15. False
  16. baking soda water
  17. soap solution
  18. a base
  19. True
  20. neutral
  21. we keep it the same
  22. an acid
  23. False
  24. False
  25. plain water
  26. it stays yellow
  27. a balloon
  28. soap solution
  29. the colour we see
  30. False
  31. False
  32. False
  33. stays yellow
  34. detergent water
  35. it stays yellow
  36. lemon juice
  37. needed
  38. reddish
  39. it turns yellow again
  40. stays yellow

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