Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 502 · 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 safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
2. 2.🫧 Which of these is an acid? (a) salt water (b) lemon juice (c) soap solution (d) baking soda water
3. 3.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
4. 4.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) muddy water (c) a battery cell (d) turmeric powder
5. 5.True or false: bran from wheat flour is done by sieving. (a) True (b) False
6. 6.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) cheese (d) butter lumps
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a mirror (c) salt (d) a shallow dish
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) how clear the water is (c) the same muddy water (d) the same funnel
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
10. 10.True or false: salt from sea water is done by winnowing. (a) False (b) True
11. 11.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) germs are invisible (c) clear water is hot (d) clear water is salty
12. 12.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so it turns yellow (d) so air gets out
13. 13.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False
14. 14.🫧 Which of these is a base? (a) soap solution (b) sugar water (c) plain water (d) vinegar
15. 15.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if shaken (d) yes, if cooled
16. 16.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) letting the paper dry (d) writing the message
17. 17.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the mud (c) the water (d) nothing
18. 18.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) lemon juice (c) yeast (d) a mirror
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a mirror (d) a magnet
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) spoons of baking soda (c) the same bottle (d) size of the balloon
21. 21.🫧 Which of these is neutral? (a) orange juice (b) vinegar (c) curd (d) sugar water
22. 22.🫗 Which of these is done by handpicking? (a) mud from water (b) husk from rice grain (c) small stones from dal (d) bran from wheat flour
23. 23.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) yes, all of it (d) it turns to sand
24. 24.True or false: warm water is something yeast does not need. (a) True (b) False
25. 25.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) True (b) False
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the same bottle
27. 27.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
28. 28.True or false: writing the message is a job a child can do. (a) False (b) True
29. 29.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) False (b) True
31. 31.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) dipping the cotton bud (c) cutting the lemon (d) putting the iron away
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) an empty bottle (c) a funnel or spoon (d) a mirror
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) salt (d) a shallow dish
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) True (b) False
37. 37.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) True (b) False
39. 39.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) the same place (c) wet or dry cotton (d) the kind of seeds
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True

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