Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 372 · 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.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
3. 3.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a magnet (c) an adult with an iron (d) a cotton bud
4. 4.🪴 Which of these is a job of the flower? (a) carry water upward (b) make seeds (c) hold up the leaves (d) hold the plant in soil
5. 5.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
6. 6.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
8. 8.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
9. 9.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) time
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🔍 Which is the odd one out? (a) ironing the paper (b) plugging in the iron (c) cutting the lemon (d) dipping the cotton bud
12. 12.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, in the dark (d) yes, if cooled
13. 13.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) salt (d) sunlight
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a balloon (c) a funnel (d) sand and pebbles
15. 15.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
16. 16.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
17. 17.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) dark green (c) pale yellow (d) bright red
18. 18.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
20. 20.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they float apart (c) they freeze (d) they react
21. 21.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
22. 22.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a battery cell (c) cotton wool (d) water
23. 23.⚖️ 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 change it (c) we measure it
24. 24.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) ghee (c) butter lumps (d) cheese
25. 25.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much more water (c) it fills with soil (d) much less water
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
28. 28.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) folding paper (d) melting butter
29. 29.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
30. 30.True or false: glucose powder does not dissolve in water. (a) False (b) True
31. 31.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) yeast (d) a magnet
32. 32.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) white paper (c) an adult with an iron (d) lemon juice
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a comb (d) sugar
35. 35.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) wet or dry cotton (c) how many seeds sprout (d) the same bowls
39. 39.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) no, germs may stay (c) yes, if it is cold (d) yes, always
40. 40.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True

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