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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 677 · 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.🔮 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
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  3. 3.True or false: salt water is a base. (a) False (b) True
  4. 4.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  6. 6.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  8. 8.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) baking soda water (d) soap solution
  9. 9.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  10. 10.🟡 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
  11. 11.🫧 Which of these is an acid? (a) sugar water (b) curd (c) detergent water (d) salt water
  12. 12.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  14. 14.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  16. 16.⚖️ 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
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a magnet (d) water
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) yeast (d) soap solution
  19. 19.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  20. 20.⚖️ 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
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the light we look in (d) the colour we see
  22. 22.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  26. 26.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  27. 27.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  28. 28.🫧 Which of these is neutral? (a) tamarind water (b) curd (c) baking soda water (d) sugar water
  29. 29.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) it stays white (d) reddish-brown
  31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.True or false: detergent water is an acid. (a) False (b) True
  33. 33.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) sugar water (d) lemon juice
  35. 35.🫧 Which of these is a base? (a) orange juice (b) baking soda water (c) sugar water (d) plain water
  36. 36.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  37. 37.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) a magnet (d) white paper strips
  38. 38.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  39. 39.True or false: yeast is needed for the turmeric test. (a) False (b) True
  40. 40.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False

Answer key

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

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