Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 259 · 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.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
4. 4.True or false: ironing the paper is a job a child can do. (a) True (b) False
5. 5.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
6. 6.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
7. 7.🔍 Which is the odd one out? (a) curd (b) vinegar (c) plain water (d) tamarind water
8. 8.True or false: small pebbles dissolves in water. (a) True (b) False
9. 9.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
10. 10.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
11. 11.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
12. 12.True or false: a balloon is needed for making butter. (a) False (b) True
13. 13.🎈 Why does the balloon blow up? (a) outside air gets in (b) vinegar is hot (c) the bottle shrinks (d) gas is made inside
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.True or false: gravel from fine sand is done by sieving. (a) False (b) True
17. 17.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) flower (c) stem (d) leaves
18. 18.True or false: time is something yeast needs. (a) False (b) True
19. 19.🪴 Through which part does a plant take in water from the soil? (a) the roots (b) the fruits (c) the flowers (d) the leaves
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) yeast
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the same bottle (c) spoons of baking soda (d) the kind of balloon
23. 23.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
24. 24.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
25. 25.True or false: a mirror is not needed for sprouting seeds. (a) True (b) False
26. 26.True or false: yeast is needed for the muddy water filter. (a) False (b) True
27. 27.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
28. 28.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) it turns blue (d) there is no change
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) flower (c) stem (d) leaves
31. 31.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter traps mud (c) the filter adds soap (d) the water evaporates
32. 32.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the juice scorches first (c) paper turns lemony (d) the iron is brown
33. 33.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
34. 34.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
36. 36.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
37. 37.True or false: vinegar is an acid. (a) False (b) True
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) a magnet (d) cotton or cloth
39. 39.🛟 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
40. 40.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) True (b) False

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