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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 971 · 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 liquid we test is the one thing we change. (a) False (b) True
  2. 2.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  4. 4.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a magnet (d) a pulley
  5. 5.True or false: salt water is an acid. (a) False (b) True
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a battery cell (c) soap solution (d) water
  8. 8.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) baking soda water (d) curd
  9. 9.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) salt water (d) baking soda water
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) salt water (d) soap solution
  13. 13.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  14. 14.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  15. 15.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  16. 16.🛟 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
  17. 17.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  18. 18.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) a magnet (d) turmeric powder
  20. 20.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  21. 21.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  22. 22.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) soap solution (d) lemon juice
  23. 23.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
  24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) reddish-brown (d) it stays white
  25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) lemon juice (d) a mirror
  28. 28.True or false: lemon juice is an acid. (a) True (b) False
  29. 29.True or false: detergent water is a base. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  32. 32.True or false: water is needed for the turmeric test. (a) False (b) True
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) lemon juice (c) white paper strips (d) a dropper or spoon
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) a magnet (d) a dropper or spoon
  35. 35.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  36. 36.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  37. 37.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) soap solution (d) a balloon
  39. 39.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  40. 40.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

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

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