Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 129 · 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.True or false: sugar is something yeast does not need. (a) False (b) True
2. 2.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
3. 3.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) a clean glass (c) cotton or cloth (d) a funnel
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
6. 6.True or false: wet seeds by a window does not sprout. (a) True (b) False
7. 7.🪴 Which part of a plant does this job: hold the plant in soil? (a) leaves (b) flower (c) stem (d) roots
8. 8.True or false: salt from sea water is done by handpicking. (a) True (b) False
9. 9.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
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 measure it (b) we keep it the same (c) we change it
11. 11.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) more butter forms (c) it turns blue (d) it turns to cheese
12. 12.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) tamarind water (d) baking soda water
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) folding paper (d) milk turning to curd
15. 15.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) yeast (c) a battery cell (d) a small bowl
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the ironing time (c) how dark the writing is (d) the kind of juice
17. 17.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a sieve (c) a pressure cooker (d) a mathani (churner)
18. 18.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter adds soap (c) the filter traps mud (d) the water evaporates
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) clearer (d) hot
20. 20.⚖️ 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 filter material (d) the same funnel
21. 21.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) letting the paper dry (d) plugging in the iron
23. 23.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) leaves (c) roots (d) flower
24. 24.🧺 Which of these is needed for making butter? (a) fresh cream (b) a balloon (c) a battery cell (d) yeast
25. 25.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
26. 26.True or false: ironing the paper is a job a child can do. (a) False (b) True
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) sugar (d) a paper clip
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) spoons of baking soda (c) the same bottle (d) the amount of vinegar
29. 29.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
30. 30.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) blue (c) dark green (d) pale yellow
31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
32. 32.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
33. 33.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) baking soda (d) vinegar
35. 35.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) turmeric powder (d) a mirror
36. 36.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
37. 37.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) turmeric powder (c) sunlight (d) a potted plant
38. 38.True or false: a comb is not needed for the fizzy balloon. (a) True (b) False
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) the kind of juice (c) how dark the writing is (d) the same paper
40. 40.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout

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