Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 342 · 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 cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) time to make butter (c) the cream temperature (d) the same jar
2. 2.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
3. 3.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
4. 4.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) dry juice is see-through (d) it turned into air
5. 5.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
6. 6.🧺 Do we need a comb for the fizzy balloon? (a) not needed (b) needed
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.True or false: sugar water keeps turmeric yellow. (a) True (b) False
9. 9.True or false: sunlight is not needed for the leafy bag test. (a) True (b) False
10. 10.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
11. 11.True or false: cutting the lemon is a job for an adult. (a) True (b) False
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
13. 13.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) chemical (c) musical (d) magnetic
14. 14.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) it is food for yeast (d) to colour it
15. 15.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) turmeric powder (d) yeast
16. 16.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
17. 17.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a pressure cooker (d) a sieve
18. 18.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
19. 19.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) keep it away from eyes (d) seal it in a glass jar
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
22. 22.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
23. 23.True or false: a balloon is needed for making butter. (a) True (b) False
24. 24.True or false: white paper is needed for the secret lemon message. (a) True (b) False
25. 25.🫗 Which of these is done by filtering? (a) gravel from fine sand (b) small stones from dal (c) mud from water (d) bran from wheat flour
26. 26.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) carry water upward (c) take in water from soil (d) make seeds
27. 27.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sand (d) sugar
28. 28.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) wash hands afterwards (d) lick your fingers
29. 29.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.True or false: soap solution is needed for the turmeric test. (a) True (b) False
31. 31.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) an empty bottle (c) a battery cell (d) vinegar
32. 32.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
33. 33.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) muddy water (c) sand and pebbles (d) a funnel
34. 34.True or false: a small bowl is needed for the secret lemon message. (a) True (b) False
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.True or false: a mirror is needed for sprouting seeds. (a) False (b) True
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) how clear the water is (c) the filter material
38. 38.🫧 Which of these is neutral? (a) curd (b) soap solution (c) vinegar (d) salt water
39. 39.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) sugar
40. 40.True or false: baking soda water is neutral. (a) True (b) False

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