Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 525 · 40 questions

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.

1. 1.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) salt water (d) detergent water
2. 2.🧺 Do we need a battery cell for sprouting seeds? (a) needed (b) not needed
3. 3.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of water (c) the amount of yeast (d) the amount of sugar
5. 5.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) plain water (d) baking soda water
6. 6.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) dry yeast (d) a small bottle
8. 8.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
9. 9.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
10. 10.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
11. 11.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
12. 12.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
13. 13.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is hot (d) clear water is sweet
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) sugar (c) a funnel or spoon (d) an empty bottle
15. 15.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
16. 16.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
19. 19.True or false: sand and pebbles is needed for the muddy water filter. (a) True (b) False
20. 20.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) neither of them (d) the hot sunny day
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) turmeric powder (d) a dropper or spoon
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) sugar (d) a balloon
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a mirror (d) warm water
26. 26.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) False (b) True
28. 28.True or false: make seeds is a job of the leaves. (a) True (b) False
29. 29.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) take in water from soil (c) make seeds (d) give out water vapour
30. 30.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) an adult with an iron (d) turmeric powder
32. 32.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) only an adult (d) the youngest child
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the amount of cream (c) the same jar (d) the cream temperature
34. 34.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
35. 35.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds on wet cotton (d) seeds in the freezer
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) vinegar
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🔍 Which is the odd one out? (a) curd (b) baking soda water (c) soap solution (d) detergent water

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