Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 537 · 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: yeast is needed for the muddy water filter. (a) False (b) True
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
3. 3.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it can block breathing (d) it is too big
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) fat bits stick together (d) shaking adds salt
6. 6.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it grows faster (d) it turns blue
7. 7.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
8. 8.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
9. 9.True or false: water is needed for sprouting seeds. (a) True (b) False
10. 10.True or false: glucose powder does not dissolve in water. (a) True (b) False
11. 11.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
12. 12.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) a battery cell (c) a magnet (d) a balloon
13. 13.⚖️ 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 sugar (b) the water temperature (c) the same bottles (d) the amount of water
14. 14.⚖️ 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
15. 15.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
16. 16.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) freezing water (d) cooking an egg
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
18. 18.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
19. 19.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
20. 20.True or false: folding paper is a change that cannot be undone. (a) False (b) True
21. 21.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) yes, they sprout (c) they turn to stones (d) they melt
22. 22.🫧 Which of these is a base? (a) vinegar (b) salt water (c) sugar water (d) baking soda water
23. 23.True or false: a magnet is not needed for the secret lemon message. (a) True (b) False
24. 24.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) it is only melting (d) yes, a new gas forms
25. 25.True or false: detergent water keeps turmeric yellow. (a) True (b) False
26. 26.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) plugging in the iron (c) ironing the paper (d) reading the message
27. 27.🫧 Which of these is a base? (a) salt water (b) lemon juice (c) sugar water (d) soap solution
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) how dark the writing is (c) the same cotton bud (d) the kind of juice
29. 29.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
30. 30.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
31. 31.🪴 Which of these is a job of the flower? (a) make food in sunlight (b) hold up the leaves (c) carry water upward (d) make seeds
32. 32.🫗 How do we separate sugar from sugar water? (a) handpicking (b) filtering (c) winnowing (d) evaporating
33. 33.⚖️ 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
34. 34.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) it fills with soil (c) much less water (d) exactly the same
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) how clear the water is (c) the same funnel (d) the amount poured
36. 36.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) almost nothing (c) blue words (d) a rainbow
37. 37.True or false: yeast is needed for growing salt crystals. (a) False (b) True
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) orange juice (d) lemon juice
40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) sugar water (d) lemon juice

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