Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 470 · 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.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
2. 2.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
3. 3.True or false: seeds on wet cotton does not sprout. (a) True (b) False
4. 4.True or false: folding paper is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
6. 6.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) detergent water (d) vinegar
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
9. 9.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is sweet (c) clear water is salty (d) clear water is hot
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
11. 11.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a mirror (c) a clear plastic bag (d) a rubber band
12. 12.True or false: warm water is something yeast does not need. (a) True (b) False
13. 13.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a seed (c) a mirror (d) baking soda
14. 14.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) green (d) bright blue
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.True or false: water is needed for sprouting seeds. (a) True (b) False
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
19. 19.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) baking soda (d) table salt
20. 20.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) paper turns lemony (c) the iron is brown (d) the juice scorches first
21. 21.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it wilts and droops (c) it grows faster (d) it turns blue
22. 22.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a few hours (d) yeast
23. 23.True or false: vinegar is an acid. (a) False (b) True
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) turmeric powder (d) a small bottle
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a balloon (c) vinegar (d) a mirror
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
27. 27.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) browning lemon ink
28. 28.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
30. 30.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) skip washing
31. 31.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) gently, not too tight (d) as tight as possible
32. 32.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) seal it in a glass jar (d) put it in your mouth
33. 33.True or false: make seeds is a job of the flower. (a) True (b) False
34. 34.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) it turned into air (d) dry juice is see-through
35. 35.True or false: sawdust dissolves in water. (a) False (b) True
36. 36.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a balloon (c) a clean glass (d) muddy water
39. 39.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: melting ice is a change that cannot be undone. (a) True (b) False

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