Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 850 · 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 is the odd one out? (a) putting the iron away (b) ironing the paper (c) dipping the cotton bud (d) plugging in the iron
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) white paper (d) a battery cell
3. 3.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) turmeric powder (d) a magnet
5. 5.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
6. 6.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) vinegar
8. 8.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
9. 9.True or false: food colour does not dissolve in water. (a) False (b) True
10. 10.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
11. 11.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
12. 12.🔮 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
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
14. 14.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) white paper (c) a mirror (d) a cotton bud
15. 15.🔍 Which is the odd one out? (a) orange juice (b) baking soda water (c) lemon juice (d) curd
16. 16.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) letting the paper dry (d) cutting the lemon
17. 17.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) writing the message (c) reading the message (d) plugging in the iron
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) a battery cell (c) vinegar (d) turmeric powder
20. 20.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) melting butter (d) cooking an egg
22. 22.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) flower (c) roots (d) stem
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
24. 24.True or false: sunlight is something yeast does not need. (a) True (b) False
25. 25.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) cheese (c) still runny cream (d) butter lumps
26. 26.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a comb (c) a magnet (d) a battery cell
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.True or false: plugging in the iron is a job a child can do. (a) True (b) False
29. 29.🫧 Which of these is a base? (a) sugar water (b) curd (c) soap solution (d) lemon juice
30. 30.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no soil (c) they are too wet (d) they have no water
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a balloon (d) salt
32. 32.🛟 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
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the amount of sugar (c) size of the balloon (d) the water temperature
34. 34.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
35. 35.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on dry cotton (c) boiled seeds (d) seeds on wet cotton
36. 36.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
37. 37.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the time we wait
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the kind of balloon (c) size of the balloon (d) spoons of baking soda
39. 39.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
40. 40.🫗 How do we separate bad grains from rice? (a) sieving (b) filtering (c) handpicking (d) winnowing

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