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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 459 · 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 turmeric paper is kept the same. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a magnet (c) soap solution (d) lemon juice
  3. 3.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a balloon (c) white paper strips (d) water
  5. 5.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  6. 6.🫧 Which of these is neutral? (a) soap solution (b) orange juice (c) sugar water (d) lemon juice
  7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  8. 8.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) vinegar (c) tamarind water (d) soap solution
  9. 9.⚖️ 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 liquid we test (c) the number of drops (d) the turmeric paper
  10. 10.True or false: yeast is needed for the turmeric test. (a) True (b) False
  11. 11.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) water (d) a balloon
  13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
  14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
  15. 15.True or false: orange juice is an acid. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
  17. 17.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  18. 18.🍋 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
  19. 19.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) baking soda water (d) soap solution
  20. 20.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) yeast (c) turmeric powder (d) white paper strips
  22. 22.True or false: lemon juice is an acid. (a) False (b) True
  23. 23.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) a prism (d) an indicator
  24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
  25. 25.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  27. 27.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  28. 28.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  29. 29.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  30. 30.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  31. 31.🔮 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
  32. 32.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  33. 33.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  36. 36.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  37. 37.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
  38. 38.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

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

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