Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 935 · 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 lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: warm water is something yeast does not need. (a) True (b) False
3. 3.True or false: husk from rice grain is done by sieving. (a) False (b) True
4. 4.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) rub it hard (c) add baking soda (d) ignore it
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a magnet (c) a mirror (d) cotton or cloth
7. 7.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) water (d) a comb
8. 8.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) rusting iron (d) browning lemon ink
9. 9.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) writing the message (c) putting the iron away (d) letting the paper dry
10. 10.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) water (c) a mirror (d) a balloon
12. 12.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
13. 13.True or false: give out water vapour is a job of the leaves. (a) False (b) True
14. 14.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) sand and pebbles (c) a magnet (d) a funnel
15. 15.True or false: make food in sunlight is a job of the stem. (a) True (b) False
16. 16.🧺 Which of these is not needed for the leafy bag test? (a) a magnet (b) a clear plastic bag (c) a potted plant (d) a rubber band
17. 17.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a battery cell (c) yeast (d) a few hours
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the amount poured (b) the filter material (c) how clear the water is
19. 19.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) veins (c) roots (d) petals
20. 20.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) sunlight (c) a mirror (d) turmeric powder
21. 21.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) a tray for spills (d) a comb
22. 22.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) True (b) False
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) dry yeast (d) a magnet
24. 24.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
26. 26.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
27. 27.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
28. 28.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) salt water (b) plain water (c) orange juice (d) sugar water
30. 30.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) True (b) False
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
33. 33.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) the number of seeds (c) the same place (d) wet or dry cotton
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a mirror (b) cold water to rinse (c) a jar with a tight lid (d) a bowl
35. 35.🧺 Do we need a battery cell for the secret lemon message? (a) not needed (b) needed
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) vinegar (c) a few hours (d) sunlight
39. 39.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same

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