Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 633 · 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 making butter? (a) a magnet (b) fresh cream (c) a jar with a tight lid (d) a bowl
2. 2.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
3. 3.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) folding paper
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) water (c) a magnet (d) a small bowl
6. 6.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a magnet (d) a mirror
7. 7.True or false: sunlight is needed for a seed to sprout. (a) True (b) False
8. 8.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a pressure cooker (c) a sieve (d) a mathani (churner)
9. 9.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a magnet (c) a funnel (d) a mirror
10. 10.🧺 Which of these is not needed for sprouting seeds? (a) a balloon (b) water (c) cotton wool (d) a small bowl
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) dry yeast (c) warm water (d) a balloon
12. 12.True or false: folding paper is a change that can be undone. (a) False (b) True
13. 13.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) no, it stays brown (c) yes, in the dark (d) yes, if shaken
14. 14.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) a rainbow (d) almost nothing
15. 15.🌱 Which of these is needed for a seed to sprout? (a) salt (b) warmth (c) soil (d) sunlight
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) gravel from fine sand (c) bad grains from rice (d) husk from rice grain
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔍 Which is the odd one out? (a) salt (b) warmth (c) air (d) water
20. 20.🔮 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
21. 21.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
22. 22.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) oil (d) buttermilk
23. 23.True or false: salt water is an acid. (a) True (b) False
24. 24.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) baking soda (c) a funnel or spoon (d) a tray for spills
25. 25.True or false: baking soda water is neutral. (a) True (b) False
26. 26.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) turmeric powder (c) a bowl (d) fresh cream
28. 28.🔍 Which is the odd one out? (a) salt (b) time (c) sunlight (d) vinegar
29. 29.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) steam (d) air from outside
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) an adult with an iron (c) turmeric powder (d) a cotton bud
31. 31.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a battery cell (c) a funnel (d) a clean glass
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a mirror (c) an adult with an iron (d) lemon juice
33. 33.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a magnet (c) a balloon (d) muddy water
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a funnel or spoon (b) a battery cell (c) a seed (d) a comb
35. 35.⚖️ 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
36. 36.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) the amount of cream (c) time to make butter (d) the same jar
38. 38.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
39. 39.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns blue (d) it turns yellow again
40. 40.True or false: vinegar is something yeast needs. (a) False (b) True

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