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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 281 · 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 baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
  4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) soap solution (c) white paper strips (d) water
  6. 6.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) turmeric powder (d) white paper strips
  10. 10.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  12. 12.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
  13. 13.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  14. 14.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) lemon juice (d) a magnet
  16. 16.True or false: plain water keeps turmeric yellow. (a) False (b) True
  17. 17.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  19. 19.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  22. 22.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
  24. 24.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  25. 25.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  27. 27.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  28. 28.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  29. 29.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  30. 30.⚖️ 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
  31. 31.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  32. 32.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a comb (d) a balloon
  35. 35.🫧 Which of these is neutral? (a) lemon juice (b) plain water (c) vinegar (d) tamarind water
  36. 36.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  37. 37.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) vinegar (d) sugar water
  38. 38.🫧 Which of these is neutral? (a) salt water (b) orange juice (c) soap solution (d) baking soda water
  39. 39.True or false: detergent water is an acid. (a) False (b) True
  40. 40.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed

Answer key

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

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