Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 675 · 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 more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) yeast (c) water (d) a few days
3. 3.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) eat a few to check (d) never put seeds in mouth
4. 4.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
6. 6.🫗 How do we separate chaff from wheat grain? (a) filtering (b) evaporating (c) sieving (d) winnowing
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is what we measure. (a) False (b) True
8. 8.True or false: cold water to rinse is needed for making butter. (a) True (b) False
9. 9.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
10. 10.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
11. 11.True or false: white paper is needed for the secret lemon message. (a) True (b) False
12. 12.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) as tight as possible (c) with sharp wire (d) with a hot glue gun
13. 13.🌱 Which of these is needed for a seed to sprout? (a) air (b) sugar (c) salt (d) soil
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the same bottles (b) size of the balloon (c) the amount of sugar (d) the water temperature
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
17. 17.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
18. 18.True or false: sugar water is a base. (a) False (b) True
19. 19.True or false: turmeric powder is needed for sprouting seeds. (a) False (b) True
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the kind of juice (c) the same paper (d) the same cotton bud
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda
22. 22.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a rolling pin (c) a mathani (churner) (d) a pressure cooker
23. 23.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is sweet (d) clear water is salty
24. 24.True or false: hold up the leaves is a job of the stem. (a) True (b) False
25. 25.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) reflection (c) germination (d) transpiration
26. 26.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) vinegar
27. 27.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
28. 28.⚖️ 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) True (b) False
29. 29.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
30. 30.True or false: time is something yeast does not need. (a) False (b) True
31. 31.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting butter (d) melting ice
32. 32.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) bubbles of gas (c) lumps of butter (d) sugar crystals
33. 33.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) it is only melting (d) yes, a new gas forms
34. 34.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they do not sprout (c) they sprout faster (d) they glow
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a piece of string (d) warm water
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the same muddy water (c) the same glass (d) the filter material
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) a clear plastic bag (d) a battery cell
38. 38.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
39. 39.True or false: freezing water is a change that cannot be undone. (a) True (b) False
40. 40.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) hold up the leaves (c) give out water vapour (d) hold the plant in soil

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