Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 463 · 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 a seed to sprout? (a) water (b) air (c) sugar (d) warmth
2. 2.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
3. 3.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False
6. 6.🧺 Which of these is not needed for making butter? (a) a mirror (b) a timer (c) a jar with a tight lid (d) fresh cream
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
8. 8.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) carry water upward (c) take in water from soil (d) make food in sunlight
9. 9.True or false: putting the iron away is a job a child can do. (a) True (b) False
10. 10.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) a cotton bud (d) lemon juice
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) a balloon
15. 15.🧺 Do we need yeast for making butter? (a) not needed (b) needed
16. 16.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) clear water is sweet (d) germs are invisible
17. 17.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a funnel (d) yeast
18. 18.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) it turns to honey (c) very little fizzing (d) the balloon bursts
19. 19.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
20. 20.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
22. 22.🪴 Which of these is a job of the roots? (a) hold the plant in soil (b) give out water vapour (c) carry water upward (d) make seeds
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
24. 24.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) add baking soda (d) rinse with clean water
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) turmeric powder (c) water (d) cotton wool
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
30. 30.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) any child (d) the youngest child
31. 31.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) leaves (c) stem (d) roots
32. 32.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
33. 33.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) vinegar (c) a tray for spills (d) a comb
34. 34.🎈 Why does the balloon blow up? (a) vinegar is hot (b) gas is made inside (c) the bottle shrinks (d) outside air gets in
35. 35.🫗 Which of these is done by winnowing? (a) mud from water (b) chaff from wheat grain (c) gravel from fine sand (d) small stones from dal
36. 36.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
37. 37.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
38. 38.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) leaves (c) roots (d) flower
39. 39.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
40. 40.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster

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