Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 824 · 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.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
2. 2.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) sugar (c) a battery cell (d) a funnel or spoon
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
4. 4.🧺 Which of these is needed for making butter? (a) a balloon (b) a magnet (c) fresh cream (d) turmeric powder
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
6. 6.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a clean glass (c) yeast (d) a battery cell
7. 7.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) boiled seeds (c) wet seeds by a window (d) seeds on wet cotton
8. 8.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the bottle got tired (c) the gas froze (d) the balloon got cold
9. 9.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so air gets out (d) so it turns yellow
10. 10.True or false: baking soda water is an acid. (a) True (b) False
11. 11.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) size of the balloon (c) the kind of balloon (d) spoons of baking soda
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same glass
14. 14.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
15. 15.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) warm water (d) turmeric powder
18. 18.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
19. 19.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
20. 20.🫧 Which of these is an acid? (a) soap solution (b) vinegar (c) sugar water (d) plain water
21. 21.🫗 How do we separate bran from wheat flour? (a) handpicking (b) sieving (c) evaporating (d) winnowing
22. 22.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) sugar water (d) plain water
26. 26.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) water (c) a small bowl (d) moong seeds
27. 27.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
28. 28.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a comb (c) baking soda (d) a balloon
30. 30.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) a magnet (d) a mirror
31. 31.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) warm water
32. 32.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) cheese (d) butter lumps
33. 33.True or false: folding paper is a change that cannot be undone. (a) True (b) False
34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
35. 35.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
36. 36.⚖️ 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) how hard we shake (c) the cream temperature (d) time to make butter
37. 37.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
38. 38.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
39. 39.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we keep it the same (c) we measure it

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