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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 226 · 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 is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  3. 3.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
  5. 5.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution
  6. 6.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  7. 7.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) lemon juice (d) sugar water
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) baking soda water (d) lemon juice
  10. 10.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) vinegar
  11. 11.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a balloon (c) white paper strips (d) soap solution
  12. 12.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  13. 13.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) tamarind water (d) detergent water
  14. 14.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  15. 15.True or false: sugar water is a base. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  17. 17.True or false: salt water is neutral. (a) False (b) True
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  19. 19.🫧 Which of these is a base? (a) plain water (b) baking soda water (c) orange juice (d) sugar water
  20. 20.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  21. 21.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  23. 23.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) a dropper or spoon (d) a balloon
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  26. 26.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  27. 27.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) detergent water (d) lemon juice
  28. 28.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  29. 29.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
  30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
  31. 31.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) yeast (d) soap solution
  33. 33.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  34. 34.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  35. 35.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  37. 37.True or false: detergent water is neutral. (a) True (b) False
  38. 38.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  39. 39.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) soap solution (c) a battery cell (d) a balloon

Answer key

  1. reddish-brown
  2. an old shirt or apron
  3. turns reddish-brown
  4. soap solution
  5. sugar water
  6. an indicator
  7. stays yellow
  8. baking soda water
  9. baking soda water
  10. soap solution
  11. a balloon
  12. needed
  13. detergent water
  14. False
  15. False
  16. True
  17. True
  18. reddish
  19. baking soda water
  20. a base
  21. True
  22. False
  23. not needed
  24. a dropper or spoon
  25. True
  26. lemon juice
  27. detergent water
  28. not needed
  29. sugar water
  30. soap water is a base
  31. it stays yellow
  32. yeast
  33. False
  34. stays yellow
  35. not needed
  36. we change it
  37. False
  38. it stays yellow
  39. stays yellow
  40. soap solution

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