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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 204 · 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: curd is a base. (a) True (b) False
  2. 2.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  3. 3.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) white paper strips (d) a comb
  6. 6.📘 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
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) soap solution (d) a magnet
  8. 8.🫧 Which of these is a base? (a) curd (b) salt water (c) sugar water (d) soap solution
  9. 9.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
  10. 10.True or false: sugar water is a base. (a) True (b) False
  11. 11.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) yeast (d) a comb
  12. 12.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  13. 13.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  14. 14.True or false: salt water keeps turmeric yellow. (a) False (b) True
  15. 15.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) turmeric powder (d) a battery cell
  17. 17.True or false: orange juice is neutral. (a) True (b) False
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  20. 20.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
  21. 21.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  23. 23.True or false: water is needed for the turmeric test. (a) False (b) True
  24. 24.⚖️ 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
  25. 25.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) baking soda water (d) detergent water
  26. 26.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  27. 27.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  28. 28.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) a mirror (d) water
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) salt water (d) baking soda water
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  32. 32.True or false: orange juice is an acid. (a) False (b) True
  33. 33.🟡 Which of these keeps turmeric yellow? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  34. 34.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  36. 36.⚖️ 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 number of drops (c) the colour we see (d) the turmeric paper
  37. 37.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) green (d) reddish-brown
  38. 38.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  39. 39.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water

Answer key

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

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