Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 971 · 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 amount poured is the one thing we change. (a) False (b) True
2. 2.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a clear plastic bag (c) a potted plant (d) sunlight
3. 3.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
4. 4.🪴 Which of these is a job of the flower? (a) hold the plant in soil (b) give out water vapour (c) make food in sunlight (d) make seeds
5. 5.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) stem (c) roots (d) flower
6. 6.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) wipe hands on face (d) nothing is needed
7. 7.🫗 Which of these is done by sieving? (a) mud from water (b) gravel from fine sand (c) chaff from wheat grain (d) sugar from sugar water
8. 8.True or false: a mirror is not needed for making butter. (a) False (b) True
9. 9.True or false: yeast is needed for the leafy bag test. (a) False (b) True
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
11. 11.🫧 Which of these is an acid? (a) detergent water (b) orange juice (c) soap solution (d) salt water
12. 12.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
14. 14.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
15. 15.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) a cotton bud (d) a battery cell
16. 16.True or false: sugar is needed for the yeast balloon. (a) True (b) False
17. 17.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on wet cotton (c) seeds on dry cotton (d) boiled seeds
18. 18.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
19. 19.⚖️ 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
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.True or false: lemon juice is neutral. (a) True (b) False
23. 23.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
24. 24.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) outside air gets in (c) vinegar is hot (d) gas is made inside
25. 25.🧺 Which of these is needed for making butter? (a) cold water to rinse (b) turmeric powder (c) yeast (d) a battery cell
26. 26.True or false: make seeds is a job of the flower. (a) False (b) True
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a balloon (d) sugar
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) how hard we shake (b) the amount of cream (c) time to make butter (d) the cream temperature
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) turmeric powder (d) a piece of string
30. 30.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
31. 31.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) sawdust (d) cooking oil
32. 32.⚖️ 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
33. 33.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) bubbles of gas (c) sugar crystals (d) lumps of butter
34. 34.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
35. 35.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) melting butter (d) freezing water
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) a battery cell
38. 38.True or false: letting the paper dry is a job a child can do. (a) False (b) True
39. 39.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) a small bowl (c) lemon juice (d) an adult with an iron
40. 40.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it

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