Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 825 · 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: a clean glass is not needed for the muddy water filter. (a) True (b) False
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a magnet (c) muddy water (d) cotton or cloth
5. 5.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) sunlight (c) a magnet (d) a potted plant
6. 6.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) any child (c) the youngest child (d) whoever is fastest
7. 7.⚖️ 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) the same funnel (c) how clear the water is
8. 8.⚖️ 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) size of the balloon (c) the amount of sugar (d) the water temperature
9. 9.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) a battery cell
10. 10.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) rinse with clean water (d) ignore it
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) a mirror (d) warm water
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the kind of juice (c) the same cotton bud (d) how dark the writing is
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the amount poured (c) the same funnel (d) the filter material
14. 14.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
15. 15.True or false: sand does not dissolve in water. (a) True (b) False
16. 16.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) shaking adds salt (d) fat bits stick together
17. 17.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a small bottle (d) a mirror
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a battery cell (d) dry yeast
20. 20.True or false: warmth is needed for a seed to sprout. (a) False (b) True
21. 21.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) yeast (d) water
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the same dish (c) the kind of salt (d) sunny or shady place
23. 23.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
24. 24.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a mirror (c) vinegar (d) baking soda
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) sugar (c) a mirror (d) a magnet
27. 27.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) skip washing (d) wash your hands
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) cotton wool (c) a balloon (d) moong seeds
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) False (b) True
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) a battery cell (d) a small bowl
31. 31.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) no, never (c) they turn to stones (d) yes, they sprout
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a flower (c) a tiny root (d) a fruit
34. 34.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) clear water only (c) lumps of butter (d) bubbles of gas
35. 35.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
36. 36.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) brown (c) white (d) blue
37. 37.🔍 Which is the odd one out? (a) soap solution (b) curd (c) detergent water (d) baking soda water
38. 38.⚖️ 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
39. 39.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
40. 40.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) leaves (c) roots (d) stem

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