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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 73 · 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: a balloon is needed for the turmeric test. (a) False (b) True
  2. 2.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  3. 3.⚖️ 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
  4. 4.🫧 Which of these is a base? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
  5. 5.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  7. 7.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the turmeric paper
  9. 9.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  10. 10.🧺 Which of these is needed for the turmeric test? (a) a comb (b) soap solution (c) a mirror (d) a balloon
  11. 11.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  13. 13.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
  15. 15.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) white paper strips (d) lemon juice
  18. 18.True or false: water is needed for the turmeric test. (a) True (b) False
  19. 19.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  20. 20.True or false: salt water is neutral. (a) True (b) False
  21. 21.⚖️ 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
  22. 22.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  23. 23.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
  24. 24.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  25. 25.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) soap solution (d) plain water
  26. 26.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  27. 27.True or false: vinegar is an acid. (a) False (b) True
  28. 28.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a comb (d) lemon juice
  29. 29.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.True or false: water is not needed for the turmeric test. (a) True (b) False
  31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
  32. 32.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  33. 33.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) an indicator (d) a magnet
  34. 34.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  35. 35.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
  36. 36.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  37. 37.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  38. 38.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  40. 40.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid

Answer key

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

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