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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 876 · 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: yeast is not needed for the turmeric test. (a) False (b) True
  2. 2.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  4. 4.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  5. 5.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) baking soda water (d) tamarind water
  6. 6.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  7. 7.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
  11. 11.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a battery cell (c) a balloon (d) a mirror
  12. 12.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  13. 13.True or false: plain water keeps turmeric yellow. (a) True (b) False
  14. 14.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  16. 16.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) lemon juice (d) baking soda water
  17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  19. 19.True or false: salt water is a base. (a) False (b) True
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) plain water (d) detergent water
  21. 21.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
  22. 22.📘 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
  23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  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.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) white paper strips (d) a battery cell
  27. 27.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  29. 29.True or false: soap solution is neutral. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  31. 31.🟡 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
  32. 32.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.🫧 Which of these is an acid? (a) vinegar (b) sugar water (c) salt water (d) detergent water
  36. 36.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  37. 37.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) soap solution (d) salt water
  38. 38.True or false: lemon juice is an acid. (a) False (b) True
  39. 39.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  40. 40.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False

Answer key

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

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