Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 406 · 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? True or false: days to see crystals is the one thing we change. (a) False (b) True
2. 2.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
4. 4.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) sugar water
5. 5.True or false: putting the iron away is a job for an adult. (a) True (b) False
6. 6.⚖️ 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
7. 7.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much more water (c) much less water (d) it fills with soil
8. 8.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
9. 9.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a magnet (c) sugar (d) warm water
11. 11.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) baking a cake (d) melting butter
12. 12.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) no butter forms (d) it turns blue
13. 13.🪴 Which of these is a job of the stem? (a) give out water vapour (b) make food in sunlight (c) take in water from soil (d) hold up the leaves
14. 14.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) rub it hard (c) add baking soda (d) ignore it
15. 15.True or false: soap solution is an acid. (a) False (b) True
16. 16.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds on wet cotton (c) boiled seeds (d) seeds in the freezer
17. 17.🔍 Which is the odd one out? (a) melting butter (b) milk turning to curd (c) freezing water (d) folding paper
18. 18.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
19. 19.True or false: carry water upward is a job of the stem. (a) True (b) False
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) baking soda (d) a magnet
21. 21.🫗 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
22. 22.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a mirror (c) vinegar (d) sunlight
23. 23.🌱 Seeds need water, air and ___ to sprout. (a) warmth (b) soil (c) sugar (d) salt
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) True (b) False
25. 25.True or false: fresh cream is not needed for making butter. (a) False (b) True
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
28. 28.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a tray for spills (c) a funnel or spoon (d) a comb
32. 32.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the amount poured (b) how clear the water is (c) the filter material
34. 34.True or false: gravel from fine sand is done by sieving. (a) True (b) False
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) warm water (d) time
36. 36.🫧 Which of these is an acid? (a) salt water (b) plain water (c) sugar water (d) vinegar
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
38. 38.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
39. 39.True or false: time is something yeast does not need. (a) True (b) False
40. 40.🧺 Do we need a comb for the fizzy balloon? (a) not needed (b) needed

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