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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 289 · 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.

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

Answer key

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

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