Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 286 · 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 yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of sugar
2. 2.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a mirror (d) sugar
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
6. 6.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) time (d) warm water
7. 7.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
8. 8.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) roots (c) flower (d) stem
9. 9.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) yeast (c) a bowl (d) fresh cream
11. 11.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) leaves stay behind (d) both stay behind
12. 12.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
15. 15.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
16. 16.True or false: yeast is not needed for making butter. (a) False (b) True
17. 17.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🫧 Which of these is neutral? (a) baking soda water (b) sugar water (c) lemon juice (d) detergent water
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) time to make butter (c) the cream temperature (d) the same jar
21. 21.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.True or false: warm water is needed for the yeast balloon. (a) False (b) True
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the time we wait (b) the same kind of bag (c) the kind of plant (d) sun or shade
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
27. 27.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting butter (d) dissolving salt
28. 28.🫗 Which of these is done by sieving? (a) small stones from dal (b) husk from rice grain (c) gravel from fine sand (d) tea leaves from tea
29. 29.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) turmeric powder (c) a few days (d) moong seeds
31. 31.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) salt (d) vinegar
32. 32.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) skip washing (d) lick your fingers
33. 33.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) sugar (c) a seed (d) a funnel or spoon
35. 35.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
37. 37.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a mirror (c) cotton or cloth (d) yeast
38. 38.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) cooking an egg (d) browning lemon ink
39. 39.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) rub it hard (d) ignore it
40. 40.⚖️ 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

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