Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 842 · 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: an adult with an iron is needed for the secret lemon message. (a) False (b) True
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of water (b) the amount of yeast (c) the water temperature (d) the same bottles
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a comb (d) warm water
4. 4.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
5. 5.True or false: letting the paper dry is a job for an adult. (a) False (b) True
6. 6.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) smoke (d) air from outside
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the mud (d) the salt
8. 8.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) an empty bottle (d) a balloon
9. 9.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it wilts and droops (c) it turns blue (d) it flowers more
10. 10.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
11. 11.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a funnel (c) yeast (d) a clean glass
15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
16. 16.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) the number of seeds (c) how many seeds sprout (d) wet or dry cotton
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
18. 18.🫧 Which of these is a base? (a) curd (b) vinegar (c) soap solution (d) sugar water
19. 19.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) yeast (c) a potted plant (d) a rubber band
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) white paper strips (c) lemon juice (d) turmeric powder
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
24. 24.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a balloon (d) a magnet
26. 26.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
27. 27.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they become magnets (c) they react (d) they float apart
28. 28.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
29. 29.🔍 Which is the odd one out? (a) water (b) warmth (c) salt (d) air
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) True (b) False
31. 31.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) how hard we shake (c) the cream temperature (d) the amount of cream
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) an adult with an iron (c) lemon juice (d) yeast
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
36. 36.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
37. 37.🛟 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
38. 38.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
39. 39.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they turn to stones (c) no, never (d) they melt
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it

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