Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 632 · 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.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) sand
2. 2.True or false: a battery cell is not needed for the secret lemon message. (a) True (b) False
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
4. 4.True or false: lemon juice is an acid. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) detergent water (d) salt water
6. 6.True or false: detergent water keeps turmeric yellow. (a) False (b) True
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it heavy (d) to make it sweet
9. 9.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
10. 10.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing stays faint (d) writing turns green
11. 11.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) sugar crystals (c) lumps of butter (d) bubbles of gas
12. 12.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
13. 13.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a balloon (c) lemon juice (d) white paper
14. 14.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) it turns to honey (c) the balloon bursts (d) a huge eruption
15. 15.True or false: detergent water is a base. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) curd (b) lemon juice (c) orange juice (d) soap solution
19. 19.True or false: sunlight is something yeast needs. (a) False (b) True
20. 20.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
21. 21.True or false: sugar water keeps turmeric yellow. (a) True (b) False
22. 22.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) dry juice is see-through (d) it turned into air
23. 23.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
24. 24.True or false: bad grains from rice is done by handpicking. (a) False (b) True
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
28. 28.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a funnel or spoon (d) a mirror
30. 30.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) how hard we shake (c) the cream temperature (d) the same jar
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) yeast (d) a battery cell
34. 34.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) cotton or cloth (c) a magnet (d) sand and pebbles
35. 35.True or false: a battery cell is not needed for making butter. (a) False (b) True
36. 36.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) letting the paper dry (c) plugging in the iron (d) cutting the lemon
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the same cotton bud (c) the kind of juice (d) the iron setting
40. 40.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a few days (c) turmeric powder (d) a balloon

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