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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 313 · 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.

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

Answer key

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

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