Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 501 · 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.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
3. 3.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
4. 4.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
5. 5.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
6. 6.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.True or false: sugar is not needed for the fizzy balloon. (a) True (b) False
9. 9.🍋 Which of these steps is a job a child can do? (a) writing the message (b) putting the iron away (c) plugging in the iron (d) ironing the paper
10. 10.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) detergent water (d) salt water
11. 11.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a clean glass (c) a battery cell (d) a balloon
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the same cotton bud
13. 13.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) cotton or cloth (c) a balloon (d) sand and pebbles
14. 14.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
15. 15.🫗 Which of these is done by winnowing? (a) salt from sea water (b) chaff from wheat grain (c) bad grains from rice (d) bran from wheat flour
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) warm water (d) a shallow dish
17. 17.True or false: melting ice is a change that cannot be undone. (a) True (b) False
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the kind of balloon
20. 20.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) vinegar (d) detergent water
21. 21.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
22. 22.🔍 Which is the odd one out? (a) table salt (b) food colour (c) baking soda (d) sand
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
24. 24.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a magnet (c) baking soda (d) vinegar
26. 26.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
27. 27.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) germination (c) reflection (d) digestion
28. 28.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
29. 29.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) the cream temperature (d) time to make butter
31. 31.🌱 Which of these is needed for a seed to sprout? (a) soil (b) warmth (c) sunlight (d) sugar
32. 32.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
33. 33.🔍 Which is the odd one out? (a) plugging in the iron (b) dipping the cotton bud (c) writing the message (d) reading the message
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the kind of salt
37. 37.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) putting the iron away (c) reading the message (d) ironing the paper
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
39. 39.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) how clear the water is (c) the same funnel (d) the filter material

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