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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 396 · 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.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) white paper strips (d) a comb
  2. 2.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  4. 4.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a comb (c) yeast (d) a mirror
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) a dropper or spoon (d) white paper strips
  6. 6.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.⚖️ 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
  8. 8.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a magnet (d) a pulley
  10. 10.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  11. 11.⚖️ 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 turmeric paper (d) the light we look in
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  13. 13.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  15. 15.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  16. 16.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  17. 17.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  18. 18.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  21. 21.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  22. 22.⚖️ 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
  23. 23.🫧 Which of these is a base? (a) curd (b) vinegar (c) plain water (d) baking soda water
  24. 24.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  25. 25.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) sugar water
  26. 26.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
  28. 28.⚖️ 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
  29. 29.⚖️ 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
  30. 30.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) soap solution (d) tamarind water
  31. 31.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  32. 32.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  33. 33.🫧 Which of these is a base? (a) detergent water (b) curd (c) tamarind water (d) lemon juice
  34. 34.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  35. 35.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  36. 36.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  37. 37.True or false: detergent water is an acid. (a) True (b) False
  38. 38.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) orange juice (d) tamarind water
  39. 39.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  40. 40.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water

Answer key

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

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