← Turmeric indicator: acid or base? lesson New set →

Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 637 · 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.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  3. 3.🫧 Which of these is a base? (a) curd (b) baking soda water (c) salt water (d) vinegar
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) white paper strips (d) yeast
  5. 5.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  7. 7.⚖️ 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 change it (c) we measure it
  8. 8.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  9. 9.🫧 Which of these is a base? (a) plain water (b) tamarind water (c) vinegar (d) detergent water
  10. 10.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  11. 11.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a dropper or spoon (d) a battery cell
  13. 13.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  14. 14.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  15. 15.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  16. 16.True or false: sugar water is neutral. (a) False (b) True
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
  20. 20.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  21. 21.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  22. 22.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  23. 23.True or false: water is needed for the turmeric test. (a) True (b) False
  24. 24.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) a comb (d) turmeric powder
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the liquid we test
  26. 26.True or false: salt water keeps turmeric yellow. (a) True (b) False
  27. 27.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
  28. 28.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) salt water (c) detergent water (d) tamarind water
  29. 29.True or false: orange juice is neutral. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) detergent water (d) plain water
  31. 31.⚖️ 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 change it (c) we measure it
  32. 32.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) orange juice (d) sugar water
  33. 33.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) a balloon (d) lemon juice
  34. 34.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
  35. 35.⚖️ 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 change it (c) we measure it
  36. 36.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a mirror (c) a balloon (d) yeast
  37. 37.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a magnet (d) a pulley
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  39. 39.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  40. 40.True or false: salt water turns turmeric reddish-brown. (a) True (b) False

Answer key

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids