Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 162 · 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: cooking an egg is a change that can be undone. (a) True (b) False
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) vinegar (d) an empty bottle
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is what we measure. (a) False (b) True
4. 4.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
5. 5.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the roots (c) the flowers (d) the fruits
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) a mirror (c) a seed (d) a comb
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
9. 9.🛟 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
10. 10.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
11. 11.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
12. 12.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
13. 13.True or false: warm water is something yeast needs. (a) False (b) True
14. 14.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
15. 15.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
16. 16.True or false: sugar is something yeast does not need. (a) True (b) False
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is the one thing we change. (a) False (b) True
19. 19.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a balloon (c) an empty bottle (d) a battery cell
20. 20.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) stem (c) flower (d) roots
21. 21.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) sugar (d) an empty bottle
22. 22.⚖️ 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
23. 23.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) the paper ate it (d) dry juice is see-through
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) seeds on dry cotton (c) boiled seeds (d) seeds in the freezer
26. 26.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) soil (c) warmth (d) sugar
27. 27.True or false: a comb is not needed for the turmeric test. (a) False (b) True
28. 28.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) cotton or cloth (c) a magnet (d) turmeric powder
29. 29.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) a battery cell (d) fresh cream
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the number of drops
31. 31.True or false: make food in sunlight is a job of the flower. (a) False (b) True
32. 32.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) cooking oil (d) food colour
33. 33.🧺 Which of these is not needed for sprouting seeds? (a) a battery cell (b) a few days (c) cotton wool (d) a small bowl
34. 34.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
35. 35.🫧 Which of these is a base? (a) tamarind water (b) curd (c) detergent water (d) salt water
36. 36.True or false: vinegar is something yeast needs. (a) True (b) False
37. 37.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
38. 38.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) it gets darker (d) the paper floats
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the mud (c) the salt (d) the water

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