Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 339 · 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 is not needed for the secret lemon message? (a) a small bowl (b) a cotton bud (c) turmeric powder (d) white paper
2. 2.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) vinegar (d) lemon juice
3. 3.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) the same place (c) the kind of seeds (d) how many seeds sprout
4. 4.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a magnet (c) cotton wool (d) a battery cell
5. 5.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
6. 6.True or false: a mirror is needed for the muddy water filter. (a) False (b) True
7. 7.True or false: a magnet is something yeast needs. (a) True (b) False
8. 8.🫗 Which of these is done by filtering? (a) sugar from sugar water (b) mud from water (c) bad grains from rice (d) small stones from dal
9. 9.True or false: a balloon is needed for sprouting seeds. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) sugar
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
13. 13.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
14. 14.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
15. 15.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
16. 16.🪴 Which of these is a job of the stem? (a) make seeds (b) make food in sunlight (c) hold the plant in soil (d) hold up the leaves
17. 17.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) an ingredient ran out (d) the bottle got tired
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🔍 Which is the odd one out? (a) soil (b) sugar (c) salt (d) water
20. 20.🧈 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
21. 21.True or false: a mirror is not needed for the secret lemon message. (a) True (b) False
22. 22.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) folding paper (d) freezing water
23. 23.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
24. 24.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they become magnets (d) they react
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) food colour (d) sand
27. 27.True or false: a small bowl is not needed for sprouting seeds. (a) True (b) False
28. 28.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves stay behind (c) leaves pass through (d) tea stays behind
29. 29.⚖️ 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 amount of sugar (b) the same bottles (c) the water temperature (d) the amount of water
30. 30.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
31. 31.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) dry yeast
33. 33.True or false: food colour does not dissolve in water. (a) False (b) True
34. 34.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
36. 36.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
37. 37.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) an adult with an iron (c) a small bowl (d) lemon juice
39. 39.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) it is only dissolving (c) it is only melting (d) no, nothing changes
40. 40.True or false: bad grains from rice is done by filtering. (a) False (b) True

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