Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 526 · 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.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the kind of salt (d) the same dish
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the same bottle (c) size of the balloon (d) the amount of vinegar
4. 4.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
6. 6.True or false: a magnet is needed for the secret lemon message. (a) False (b) True
7. 7.🫗 How do we separate bad grains from rice? (a) filtering (b) winnowing (c) handpicking (d) sieving
8. 8.True or false: cooking an egg is a change that can be undone. (a) True (b) False
9. 9.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
10. 10.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.⚖️ 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
12. 12.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) an adult with an iron (c) a small bowl (d) a cotton bud
14. 14.⚖️ 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 muddy water (b) the same glass (c) the filter material (d) the amount poured
15. 15.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) sunlight (b) warmth (c) air (d) water
17. 17.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🧈 Why does shaking cream make butter? (a) the lid is warm (b) fat bits stick together (c) shaking adds salt (d) the jar adds butter
20. 20.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
21. 21.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) rub it hard (c) ignore it (d) add baking soda
22. 22.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) folding paper
23. 23.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) white paper strips (c) a dropper or spoon (d) turmeric powder
25. 25.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it is too big (d) it can block breathing
26. 26.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) writing the message (c) cutting the lemon (d) plugging in the iron
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the amount poured (c) the same muddy water (d) the filter material
28. 28.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) bubbles of gas (c) lumps of butter (d) clear water only
29. 29.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they are too wet (c) they have no water (d) they have no salt
30. 30.True or false: glucose powder does not dissolve in water. (a) True (b) False
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) detergent water (d) plain water
33. 33.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
34. 34.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
35. 35.True or false: reading the message is a job for an adult. (a) False (b) True
36. 36.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) very little fizzing (c) it turns to honey (d) the balloon bursts
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
38. 38.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) germination (c) digestion (d) reflection
39. 39.True or false: gravel from fine sand is done by handpicking. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) lemon juice (d) plain water

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