Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 218 · 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 — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
3. 3.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
4. 4.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a clear plastic bag (c) a battery cell (d) turmeric powder
5. 5.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) milk turning to curd (c) rusting iron (d) baking a cake
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) vinegar (c) baking soda (d) sugar
7. 7.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) a battery cell (d) white paper strips
8. 8.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a balloon (c) muddy water (d) turmeric powder
9. 9.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) muddy water (c) yeast (d) cotton or cloth
10. 10.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) vinegar (c) baking soda (d) a seed
11. 11.True or false: sunlight is not needed for the leafy bag test. (a) False (b) True
12. 12.True or false: lemon juice is neutral. (a) False (b) True
13. 13.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a bowl (c) fresh cream (d) a balloon
14. 14.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
15. 15.🫧 Which of these is neutral? (a) plain water (b) curd (c) vinegar (d) lemon juice
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) warm water (d) a battery cell
17. 17.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter adds soap (c) the mud dissolves (d) the filter traps mud
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🧺 Which of these is not needed for the muddy water filter? (a) a battery cell (b) a clean glass (c) sand and pebbles (d) a funnel
20. 20.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
21. 21.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
22. 22.True or false: sugar water is neutral. (a) False (b) True
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is the one thing we change. (a) False (b) True
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar
25. 25.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a mirror (d) muddy water
26. 26.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is the one thing we change. (a) False (b) True
27. 27.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
28. 28.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) transpiration (c) reflection (d) germination
29. 29.🫧 Which of these is an acid? (a) vinegar (b) detergent water (c) salt water (d) soap solution
30. 30.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) the same kind of bag (c) sun or shade
32. 32.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) how clear the water is (c) the amount poured (d) the filter material
34. 34.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
37. 37.True or false: salt is needed for a seed to sprout. (a) False (b) True
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) salt water (d) vinegar
39. 39.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
40. 40.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the gas froze (c) the balloon got cold (d) the bottle got tired

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