Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 720 · 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.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
2. 2.🧺 Which of these is needed for making butter? (a) yeast (b) a balloon (c) a mirror (d) a jar with a tight lid
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a magnet (c) a balloon (d) white paper
5. 5.⚖️ 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 same jar (c) how hard we shake (d) the cream temperature
6. 6.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) vinegar (d) plain water
7. 7.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
8. 8.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
9. 9.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so air gets out (d) so it turns yellow
10. 10.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
11. 11.True or false: sunlight is needed for the leafy bag test. (a) False (b) True
12. 12.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) still runny cream (d) ghee
13. 13.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.True or false: wet seeds in the dark does not sprout. (a) False (b) True
15. 15.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) oxygen (c) helium (d) carbon dioxide
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) a balloon (d) a magnet
17. 17.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the filter traps mud (c) the mud dissolves (d) the water evaporates
18. 18.🔍 Which is the odd one out? (a) baking a cake (b) browning lemon ink (c) melting ice (d) milk turning to curd
19. 19.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) sugar (d) a small bottle
21. 21.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) soap solution (c) salt water (d) sugar water
23. 23.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
24. 24.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a funnel (c) muddy water (d) a magnet
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) baking soda (d) small pebbles
27. 27.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) a jar with a tight lid (d) a balloon
29. 29.🧺 Which of these is not needed for making butter? (a) a balloon (b) a bowl (c) a jar with a tight lid (d) fresh cream
30. 30.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
32. 32.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a battery cell (d) a comb
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
35. 35.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) putting the iron away (c) dipping the cotton bud (d) ironing the paper
36. 36.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
37. 37.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) wet seeds by a window (c) boiled seeds (d) seeds in the freezer
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) size of the balloon (c) the same bottle (d) spoons of baking soda
39. 39.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the number of seeds (b) wet or dry cotton (c) how many seeds sprout
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True

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