Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 643 · 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: detergent water is a base. (a) True (b) False
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) True (b) False
3. 3.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same glass (b) the filter material (c) how clear the water is
5. 5.True or false: yeast is needed for making butter. (a) True (b) False
6. 6.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
7. 7.True or false: a balloon is needed for making butter. (a) False (b) True
8. 8.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
9. 9.True or false: rusting iron is a change that can be undone. (a) True (b) False
10. 10.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
12. 12.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
13. 13.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) plugging in the iron (c) ironing the paper (d) writing the message
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a paper clip (d) a small bottle
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
17. 17.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) size of the balloon (c) spoons of baking soda (d) the kind of balloon
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.True or false: food colour dissolves in water. (a) False (b) True
21. 21.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
23. 23.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) a battery cell (c) water (d) yeast
24. 24.True or false: time is something yeast needs. (a) True (b) False
25. 25.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) an adult with an iron (c) a cotton bud (d) a mirror
26. 26.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so air gets out (c) so it turns yellow (d) so it gets hot
27. 27.True or false: a magnet is needed for the muddy water filter. (a) False (b) True
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
29. 29.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a magnet (c) a seed (d) vinegar
30. 30.🫗 Which of these is done by filtering? (a) mud from water (b) husk from rice grain (c) bran from wheat flour (d) chaff from wheat grain
31. 31.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) moong seeds (c) water (d) a mirror
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a clean glass (c) muddy water (d) yeast
33. 33.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) clearer (d) muddier
34. 34.True or false: yeast is not needed for the turmeric test. (a) False (b) True
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a small bottle (d) a mirror
36. 36.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
37. 37.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) plugging in the iron (c) reading the message (d) writing the message
38. 38.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True

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