Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 577 · 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) plugging in the iron (b) dipping the cotton bud (c) writing the message (d) letting the paper dry
2. 2.True or false: freezing water is a change that can be undone. (a) False (b) True
3. 3.True or false: wet seeds in the dark does not sprout. (a) True (b) False
4. 4.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
5. 5.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
6. 6.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
7. 7.⚖️ 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 funnel (c) the filter material (d) the same muddy water
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
9. 9.True or false: bran from wheat flour is done by sieving. (a) False (b) True
10. 10.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
11. 11.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
14. 14.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) a small bowl (d) a magnet
15. 15.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) turmeric powder (c) yeast (d) cotton wool
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
17. 17.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
18. 18.🫧 Which of these is an acid? (a) soap solution (b) curd (c) baking soda water (d) salt water
19. 19.True or false: air is not needed for a seed to sprout. (a) True (b) False
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a shallow dish (d) warm water
21. 21.🫗 Which of these is done by filtering? (a) mud from water (b) chaff from wheat grain (c) sugar from sugar water (d) small stones from dal
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) how hard we shake
23. 23.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) yes, they sprout (c) they turn to stones (d) they melt
24. 24.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) baking soda (c) a balloon (d) an empty bottle
25. 25.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
27. 27.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
28. 28.🔍 Which is the odd one out? (a) sunlight (b) air (c) water (d) warmth
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) ghee (d) still runny cream
31. 31.True or false: letting the paper dry is a job a child can do. (a) True (b) False
32. 32.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
33. 33.True or false: ironing the paper is a job for an adult. (a) False (b) True
34. 34.True or false: yeast is needed for the turmeric test. (a) False (b) True
35. 35.True or false: salt is something yeast does not need. (a) False (b) True
36. 36.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) how many seeds sprout (c) the same bowls (d) wet or dry cotton
37. 37.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) glucose powder (d) sugar
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
40. 40.True or false: a magnet is not needed for the turmeric test. (a) True (b) False

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