Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 124 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) no, nothing changes (c) yes, a new gas forms (d) it is only dissolving
3. 3.True or false: bad grains from rice is done by filtering. (a) True (b) False
4. 4.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) cotton or cloth (c) a mirror (d) sand and pebbles
5. 5.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a few hours (c) a magnet (d) sunlight
6. 6.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) white paper (d) yeast
7. 7.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) an empty bottle (c) a tray for spills (d) a seed
8. 8.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) salt from sea water (c) mud from water (d) small stones from dal
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.True or false: warmth is not needed for a seed to sprout. (a) False (b) True
11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) cotton wool (c) water (d) turmeric powder
13. 13.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) ignore it (d) rub it hard
14. 14.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
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 the one thing we change. (a) False (b) True
16. 16.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a mirror (c) a funnel (d) turmeric powder
17. 17.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
18. 18.🔍 Which is the odd one out? (a) putting the iron away (b) letting the paper dry (c) writing the message (d) reading the message
19. 19.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) False (b) True
20. 20.🧺 Do we need a timer for making butter? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) plain water (d) baking soda water
22. 22.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
23. 23.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
24. 24.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) baking soda water (d) detergent water
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🔍 Which is the odd one out? (a) melting ice (b) melting butter (c) browning lemon ink (d) freezing water
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
28. 28.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) a magnet (d) baking soda
29. 29.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
32. 32.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
33. 33.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a balloon (d) a small bottle
35. 35.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) salt from sea water (c) small stones from dal (d) gravel from fine sand
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
37. 37.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
39. 39.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) yeast (c) muddy water (d) a funnel
40. 40.🔍 Which is the odd one out? (a) cooking an egg (b) browning lemon ink (c) baking a cake (d) melting butter

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