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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 739 · 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.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.⚖️ 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
  3. 3.🫧 Which of these is a base? (a) salt water (b) vinegar (c) tamarind water (d) baking soda water
  4. 4.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a magnet (c) yeast (d) a comb
  5. 5.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  6. 6.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  7. 7.True or false: salt water is a base. (a) False (b) True
  8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  9. 9.🛟 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
  10. 10.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  11. 11.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) tamarind water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a magnet (d) turmeric powder
  14. 14.True or false: orange juice is an acid. (a) True (b) False
  15. 15.⚖️ 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
  16. 16.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  17. 17.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  21. 21.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.⚖️ 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 liquid we test (c) the colour we see (d) the turmeric paper
  23. 23.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  24. 24.True or false: detergent water is neutral. (a) True (b) False
  25. 25.🧺 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
  26. 26.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  27. 27.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  28. 28.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  29. 29.True or false: baking soda water is neutral. (a) True (b) False
  30. 30.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  32. 32.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) an indicator (d) a prism
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) yeast (d) lemon juice
  34. 34.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  35. 35.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) lemon juice (d) sugar water
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  37. 37.True or false: a comb is needed for the turmeric test. (a) True (b) False
  38. 38.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  39. 39.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  40. 40.True or false: baking soda water keeps turmeric yellow. (a) False (b) True

Answer key

  1. stays yellow
  2. we keep it the same
  3. baking soda water
  4. soap solution
  5. use only kitchen items
  6. True
  7. False
  8. reddish
  9. an old shirt or apron
  10. an acid
  11. it turns yellow again
  12. soap solution
  13. a magnet
  14. True
  15. we keep it the same
  16. turns reddish-brown
  17. True
  18. an acid
  19. we measure it
  20. True
  21. stays yellow
  22. the liquid we test
  23. an acid
  24. False
  25. a balloon
  26. True
  27. neutral
  28. False
  29. False
  30. turns reddish-brown
  31. True
  32. an indicator
  33. yeast
  34. needed
  35. baking soda water
  36. we keep it the same
  37. False
  38. needed
  39. neutral
  40. False

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