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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 729 · 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.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  2. 2.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) salt water (d) vinegar
  4. 4.True or false: curd is a base. (a) False (b) True
  5. 5.⚖️ 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
  6. 6.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  7. 7.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  8. 8.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  9. 9.⚖️ 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 turmeric paper (c) the light we look in (d) the liquid we test
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) a dropper or spoon (c) lemon juice (d) turmeric powder
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a magnet (d) water
  13. 13.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  14. 14.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
  15. 15.True or false: plain water is neutral. (a) True (b) False
  16. 16.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
  17. 17.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) a pulley (d) an indicator
  18. 18.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  20. 20.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) white paper strips (c) soap solution (d) lemon juice
  23. 23.🫧 Which of these is a base? (a) lemon juice (b) baking soda water (c) orange juice (d) tamarind water
  24. 24.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  26. 26.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
  27. 27.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
  28. 28.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) sugar water (d) plain water
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  30. 30.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  31. 31.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  33. 33.🫧 Which of these is neutral? (a) detergent water (b) sugar water (c) vinegar (d) curd
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  35. 35.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  36. 36.True or false: baking soda water is a base. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) baking soda water (c) tamarind water (d) vinegar
  39. 39.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) soap solution (d) a mirror

Answer key

  1. True
  2. stays yellow
  3. detergent water
  4. False
  5. we keep it the same
  6. not needed
  7. needed
  8. an acid
  9. the liquid we test
  10. a mirror
  11. the light we look in
  12. a magnet
  13. use only kitchen items
  14. soap solution
  15. True
  16. soap water is a base
  17. an indicator
  18. a base
  19. False
  20. stays yellow
  21. True
  22. a balloon
  23. baking soda water
  24. turns reddish-brown
  25. True
  26. salt water
  27. lemon juice
  28. soap solution
  29. the turmeric paper
  30. reddish
  31. True
  32. True
  33. sugar water
  34. True
  35. vinegar
  36. True
  37. we measure it
  38. baking soda water
  39. False
  40. soap solution

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