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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 952 · 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.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  2. 2.⚖️ 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
  3. 3.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  5. 5.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) soap solution (d) baking soda water
  6. 6.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  8. 8.🔮 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
  9. 9.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  10. 10.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the liquid we test
  12. 12.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) a comb (d) soap solution
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  15. 15.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  16. 16.🫧 Which of these is neutral? (a) salt water (b) tamarind water (c) detergent water (d) vinegar
  17. 17.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  18. 18.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) detergent water (d) tamarind water
  22. 22.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  23. 23.🫧 Which of these is a base? (a) curd (b) sugar water (c) detergent water (d) lemon juice
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) baking soda water (c) salt water (d) sugar water
  25. 25.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
  26. 26.🫧 Which of these is a base? (a) orange juice (b) baking soda water (c) salt water (d) vinegar
  27. 27.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the colour we see (d) the turmeric paper
  29. 29.True or false: vinegar is a base. (a) True (b) False
  30. 30.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  31. 31.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  32. 32.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) white paper strips (d) a battery cell
  33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) a dropper or spoon (d) soap solution
  35. 35.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  37. 37.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  38. 38.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  39. 39.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  40. 40.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed

Answer key

  1. an acid
  2. we measure it
  3. needed
  4. False
  5. vinegar
  6. soap water is a base
  7. False
  8. reddish
  9. lemon juice
  10. it stays yellow
  11. the liquid we test
  12. False
  13. soap solution
  14. True
  15. needed
  16. salt water
  17. needed
  18. stays yellow
  19. False
  20. False
  21. detergent water
  22. False
  23. detergent water
  24. baking soda water
  25. an old shirt or apron
  26. baking soda water
  27. neutral
  28. the colour we see
  29. False
  30. a base
  31. neutral
  32. white paper strips
  33. reddish-brown
  34. a battery cell
  35. stays yellow
  36. an acid
  37. False
  38. not needed
  39. not needed
  40. needed

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