Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 651 · 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.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
2. 2.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) cotton wool (c) a magnet (d) a few days
3. 3.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) lemon juice (d) a magnet
4. 4.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
5. 5.🫧 Which of these is a base? (a) lemon juice (b) vinegar (c) soap solution (d) curd
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
8. 8.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
9. 9.True or false: sugar water is an acid. (a) False (b) True
10. 10.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
11. 11.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a comb (d) soap solution
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a funnel or spoon (c) sugar (d) baking soda
13. 13.🛟 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
14. 14.🌱 Which of these is not needed for a seed to sprout? (a) water (b) warmth (c) air (d) soil
15. 15.🫗 Which of these is done by evaporating? (a) mud from water (b) salt from sea water (c) husk from rice grain (d) small stones from dal
16. 16.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a magnet (c) a seed (d) a balloon
17. 17.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
18. 18.🫗 Which of these is done by filtering? (a) salt from sea water (b) mud from water (c) husk from rice grain (d) gravel from fine sand
19. 19.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
21. 21.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
22. 22.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) dipping the cotton bud (c) writing the message (d) ironing the paper
23. 23.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a tiny root (c) a fruit (d) a thorn
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) a piece of string
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a comb (c) a dropper or spoon (d) white paper strips
26. 26.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a cotton bud (c) a mirror (d) a small bowl
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of salt
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the same jar (c) the cream temperature (d) how hard we shake
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) an adult with an iron (c) white paper (d) a magnet
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) soap solution (d) plain water
34. 34.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
35. 35.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) turmeric powder (c) a small bowl (d) a mirror
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a battery cell (d) turmeric powder
39. 39.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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