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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 388 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  2. 2.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  3. 3.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  5. 5.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  6. 6.🔍 Which is the odd one out? (a) tamarind water (b) lemon juice (c) salt water (d) soap solution
  7. 7.🛟 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
  8. 8.🔮 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
  9. 9.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  10. 10.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  11. 11.⚖️ 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 light we look in (d) the turmeric paper
  12. 12.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  13. 13.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
  16. 16.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) a dropper or spoon (d) turmeric powder
  18. 18.⚖️ 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
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) water (d) lemon juice
  20. 20.🔍 Which is the odd one out? (a) plain water (b) salt water (c) detergent water (d) sugar water
  21. 21.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) water (d) a magnet
  22. 22.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a prism (d) a magnet
  23. 23.True or false: soap solution is a base. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  25. 25.True or false: salt water keeps turmeric yellow. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) water (d) a mirror
  28. 28.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) orange juice (d) salt water
  29. 29.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  31. 31.🫧 Which of these is neutral? (a) salt water (b) baking soda water (c) lemon juice (d) vinegar
  32. 32.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  33. 33.⚖️ 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
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  35. 35.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  36. 36.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) a comb (d) yeast
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) yeast (d) soap solution
  38. 38.True or false: tamarind water is a base. (a) False (b) True
  39. 39.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  40. 40.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

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

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