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Turmeric Indicator Experiment Worksheet

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

Answer key

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

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