Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 111 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) a battery cell
2. 2.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a rolling pin (c) a mathani (churner) (d) a pressure cooker
3. 3.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
4. 4.🔍 Which is the odd one out? (a) sand (b) sugar (c) sawdust (d) chalk powder
5. 5.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a battery cell (c) a balloon (d) white paper
6. 6.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) salt water (d) baking soda water
7. 7.True or false: a tray for spills is needed for the fizzy balloon. (a) True (b) False
8. 8.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a shallow dish (d) a spoon
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) True (b) False
11. 11.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
12. 12.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) fresh cream (d) turmeric powder
13. 13.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) it turns to sugar (d) no, salt passes through
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a mirror (b) a jar with a tight lid (c) fresh cream (d) a timer
15. 15.True or false: an adult with an iron is needed for the secret lemon message. (a) False (b) True
16. 16.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) no, germs may stay (c) yes, always (d) yes, if it is clear
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) warm water (c) a piece of string (d) salt
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🔍 Which is the odd one out? (a) detergent water (b) curd (c) baking soda water (d) soap solution
20. 20.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) flower (c) leaves (d) roots
21. 21.True or false: table salt does not dissolve in water. (a) False (b) True
22. 22.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) cold water to rinse (d) a battery cell
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) wet or dry cotton (c) how many seeds sprout
24. 24.🔮 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
25. 25.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
28. 28.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) nothing at all (c) it glows in the dark (d) lots of fizzy bubbles
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) folding paper (d) milk turning to curd
31. 31.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
34. 34.True or false: dipping the cotton bud is a job a child can do. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) cotton or cloth (c) a battery cell (d) a funnel
37. 37.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) a shallow dish (d) salt
39. 39.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
40. 40.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed

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