Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 554 · 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.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
2. 2.True or false: freezing water is a change that cannot be undone. (a) False (b) True
3. 3.True or false: a balloon is needed for the fizzy balloon. (a) False (b) True
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
5. 5.True or false: carry water upward is a job of the stem. (a) True (b) False
6. 6.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) dry yeast (d) a balloon
8. 8.📘 What do we call a seed starting to grow? (a) germination (b) evaporation (c) pollination (d) condensation
9. 9.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) clear water is hot (d) germs are invisible
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a small bottle (d) a balloon
11. 11.🔍 Which is the odd one out? (a) melting ice (b) freezing water (c) browning lemon ink (d) melting butter
12. 12.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
13. 13.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
14. 14.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) a mirror (d) a few days
15. 15.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
16. 16.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) turmeric powder (d) cotton or cloth
17. 17.🫗 How do we separate salt from sea water? (a) handpicking (b) sieving (c) evaporating (d) winnowing
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) salt
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a battery cell (d) a spoon
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the size of the plant (c) amount of water drops (d) the time we wait
22. 22.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) stem (c) roots (d) leaves
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) plugging in the iron (d) putting the iron away
25. 25.True or false: turmeric powder is not needed for the leafy bag test. (a) True (b) False
26. 26.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) seeds on wet cotton (c) wet seeds in the dark (d) wet seeds by a window
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the kind of juice (c) the same paper (d) the iron setting
28. 28.⚖️ 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
29. 29.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
30. 30.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) magnetic (d) chemical
31. 31.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
32. 32.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) small pebbles (d) sawdust
33. 33.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the salt (c) the water (d) the mud
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) the cream temperature (d) time to make butter
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.True or false: warm water is needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
39. 39.🫗 Which of these is done by filtering? (a) bad grains from rice (b) chaff from wheat grain (c) tea leaves from tea (d) bran from wheat flour
40. 40.True or false: air is not needed for a seed to sprout. (a) True (b) False

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