Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 884 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) yeast (d) cotton or cloth
3. 3.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) turmeric powder (d) warm water
7. 7.True or false: a mirror is needed for making butter. (a) True (b) False
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
12. 12.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
13. 13.⚖️ 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 yeast
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the amount of water (c) size of the balloon (d) the water temperature
15. 15.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
16. 16.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) tea stays behind (c) leaves pass through (d) both stay behind
17. 17.🔍 Which is the odd one out? (a) sunlight (b) warmth (c) soil (d) salt
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
20. 20.True or false: salt from sea water is done by sieving. (a) False (b) True
21. 21.True or false: seeds on dry cotton sprouts in a few days. (a) True (b) False
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
23. 23.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) plugging in the iron (b) cutting the lemon (c) putting the iron away (d) letting the paper dry
25. 25.True or false: air is not needed for a seed to sprout. (a) True (b) False
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a comb (c) sugar (d) an empty bottle
27. 27.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) stomata (c) roots (d) veins
28. 28.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
29. 29.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) clear water is sweet (d) germs are invisible
30. 30.🌱 What comes out of a moong seed first when it sprouts? (a) a fruit (b) a tiny root (c) a flower (d) a thorn
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
32. 32.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) salt water (d) lemon juice
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a balloon (c) lemon juice (d) a cotton bud
34. 34.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
35. 35.🧺 Do we need a comb for the fizzy balloon? (a) not needed (b) needed
36. 36.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a magnet (c) yeast (d) muddy water
37. 37.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
38. 38.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) with sharp wire (d) gently, not too tight
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sugar (d) a magnet
40. 40.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the salt (d) the mud

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