Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 285 · 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.True or false: a comb is needed for the yeast balloon. (a) True (b) False
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) True (b) False
4. 4.True or false: reading the message is a job for an adult. (a) False (b) True
5. 5.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) lumps of butter (c) clear water only (d) bubbles of gas
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) salt (d) a spoon
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a mirror (c) a clean glass (d) cotton or cloth
9. 9.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a magnet (c) lemon juice (d) a small bowl
10. 10.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) a balloon (d) a battery cell
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
12. 12.True or false: cotton or cloth is not needed for the muddy water filter. (a) False (b) True
13. 13.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a battery cell (c) fresh cream (d) a timer
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the amount of cream (c) time to make butter (d) how hard we shake
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) baking a cake
16. 16.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
17. 17.True or false: baking soda is not needed for the fizzy balloon. (a) False (b) True
18. 18.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) a seed (d) an empty bottle
19. 19.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) roots (c) flower (d) stem
20. 20.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter traps mud (d) the filter adds soap
21. 21.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) hydrogen (c) helium (d) oxygen
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a mirror (d) warm water
23. 23.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
24. 24.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a funnel (c) a clean glass (d) turmeric powder
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) an adult with an iron (c) a cotton bud (d) a small bowl
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) salt water (d) vinegar
29. 29.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) salty (d) muddier
30. 30.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a mirror (c) a rubber band (d) a clear plastic bag
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a small bowl (c) yeast (d) lemon juice
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) no, it stays brown (c) yes, if shaken (d) yes, in the dark
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) dark green (c) pale yellow (d) bright red
37. 37.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
38. 38.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a potted plant (c) a magnet (d) a few hours
39. 39.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) a mirror (c) yeast (d) a magnet
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True

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