Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 336 · 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 done by handpicking? (a) bran from wheat flour (b) husk from rice grain (c) small stones from dal (d) mud from water
2. 2.True or false: tamarind water is an acid. (a) False (b) True
3. 3.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a few days (c) turmeric powder (d) water
4. 4.🧺 Which of these is needed for sprouting seeds? (a) a small bowl (b) a mirror (c) yeast (d) turmeric powder
5. 5.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
6. 6.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it wilts and droops (d) it turns blue
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the ironing time
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
10. 10.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) lick your fingers (d) rub your eyes
11. 11.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
12. 12.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
13. 13.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a rubber band (c) sunlight (d) a potted plant
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
16. 16.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) a small bowl (d) a balloon
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) how dark the writing is (c) the same paper (d) the ironing time
19. 19.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
20. 20.🧺 Which of these is needed for sprouting seeds? (a) water (b) turmeric powder (c) a mirror (d) a balloon
21. 21.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a battery cell (c) a few hours (d) turmeric powder
22. 22.🪴 Which of these is a job of the flower? (a) carry water upward (b) make seeds (c) make food in sunlight (d) give out water vapour
23. 23.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
24. 24.True or false: salt water is neutral. (a) False (b) True
25. 25.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) a seed (d) vinegar
26. 26.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) sugar (c) baking soda (d) a tray for spills
27. 27.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) an empty bottle (c) vinegar (d) a battery cell
28. 28.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) vinegar
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) milk turning to curd (d) baking a cake
31. 31.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) the youngest child (d) any child
32. 32.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
33. 33.True or false: detergent water is an acid. (a) False (b) True
34. 34.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it is too big (d) it can block breathing
35. 35.True or false: turmeric powder is not needed for the leafy bag test. (a) True (b) False
36. 36.🫗 Which of these is done by sieving? (a) sugar from sugar water (b) husk from rice grain (c) bran from wheat flour (d) chaff from wheat grain
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) sugar (d) dry yeast
38. 38.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
39. 39.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we keep it the same (c) we measure it

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