Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 942 · 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 yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the same bottles (c) size of the balloon (d) the amount of sugar
2. 2.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it turns blue (c) it grows faster (d) it flowers more
3. 3.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) white paper (c) a mirror (d) a balloon
4. 4.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) the balloon got cold (d) an ingredient ran out
5. 5.🫗 How do we separate bran from wheat flour? (a) handpicking (b) winnowing (c) evaporating (d) sieving
6. 6.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
8. 8.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the kind of salt (c) the amount of salt (d) the same dish
10. 10.🔍 Which is the odd one out? (a) salt water (b) plain water (c) tamarind water (d) sugar water
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.True or false: make seeds is a job of the roots. (a) False (b) True
13. 13.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
14. 14.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the number of seeds (c) wet or dry cotton
15. 15.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
17. 17.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a battery cell (c) a tray for spills (d) a mirror
18. 18.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) cotton or cloth (c) a clean glass (d) a mirror
19. 19.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
20. 20.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) there is no change (d) it turns blue
21. 21.True or false: yeast is needed for sprouting seeds. (a) False (b) True
22. 22.🧺 Which of these is not needed for making butter? (a) turmeric powder (b) a timer (c) a jar with a tight lid (d) a bowl
23. 23.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it turns yellow (c) so it gets hot (d) so cream does not spill
24. 24.True or false: salt is something yeast needs. (a) True (b) False
25. 25.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a battery cell (c) a potted plant (d) sunlight
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) dry yeast (d) sugar
27. 27.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) turmeric powder (c) moong seeds (d) a few days
29. 29.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) clearer (d) muddier
30. 30.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
32. 32.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
33. 33.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) table salt
35. 35.🪴 Which of these is a job of the flower? (a) give out water vapour (b) hold the plant in soil (c) make seeds (d) make food in sunlight
36. 36.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
37. 37.True or false: detergent water keeps turmeric yellow. (a) True (b) False
38. 38.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
39. 39.🪴 Which part of a plant does this job: hold the plant in soil? (a) stem (b) flower (c) roots (d) leaves
40. 40.True or false: tamarind water keeps turmeric yellow. (a) False (b) True

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