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Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 473 · 40 questions
TalentJR

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

NameDateTime takenScore ___ / 40
  1. 1.True or false: boiled seeds does not sprout. (a) False (b) True
  2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) the same muddy water (c) the filter material (d) how clear the water is
  3. 3.True or false: salt water is an acid. (a) True (b) False
  4. 4.True or false: baking a cake is a change that can be undone. (a) False (b) True
  5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
  6. 6.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) keep it away from eyes (d) seal it in a glass jar
  7. 7.True or false: a magnet is needed for the secret lemon message. (a) True (b) False
  8. 8.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
  9. 9.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) detergent water (d) tamarind water
  10. 10.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
  11. 11.True or false: salt is not needed for growing salt crystals. (a) True (b) False
  12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
  13. 13.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) add baking soda (d) rub it hard
  14. 14.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  15. 15.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) throw them at friends (d) feed them to pets
  16. 16.True or false: detergent water is an acid. (a) True (b) False
  17. 17.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on dry cotton (c) wet seeds in the dark (d) boiled seeds
  18. 18.True or false: curd is neutral. (a) True (b) False
  19. 19.🌱 Which of these is not needed for a seed to sprout? (a) air (b) soil (c) warmth (d) water
  20. 20.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  21. 21.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  22. 22.🌱 Where does a sprouting seed get its first food from? (a) the sunlight only (b) food stored in the seed (c) the cotton wool (d) the air
  23. 23.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sugar (d) sand
  24. 24.True or false: putting the iron away is a job for an adult. (a) False (b) True
  25. 25.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) no, salt passes through (c) it turns to sand (d) yes, all of it
  26. 26.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  27. 27.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
  28. 28.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
  29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we change it (c) we measure it
  30. 30.True or false: salt water is neutral. (a) True (b) False
  31. 31.True or false: fresh cream is not needed for making butter. (a) True (b) False
  32. 32.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  33. 33.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) False (b) True
  34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
  35. 35.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
  36. 36.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no water (c) they are too wet (d) they have no salt
  37. 37.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  38. 38.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  39. 39.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  40. 40.True or false: a tray for spills is not needed for the fizzy balloon. (a) False (b) True

Answer key

  1. True
  2. the filter material
  3. False
  4. False
  5. True
  6. keep it away from eyes
  7. False
  8. needed
  9. tamarind water
  10. needed
  11. False
  12. we measure it
  13. rinse with clean water
  14. warm, not hot
  15. never put seeds in mouth
  16. False
  17. wet seeds in the dark
  18. False
  19. soil
  20. reddish-brown
  21. True
  22. food stored in the seed
  23. sand
  24. True
  25. no, salt passes through
  26. not needed
  27. needed
  28. a child can do it
  29. we keep it the same
  30. True
  31. False
  32. plain water
  33. False
  34. True
  35. germs are invisible
  36. they have no water
  37. True
  38. False
  39. not needed
  40. False

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