Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 238 · 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 — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the iron setting (c) the kind of juice (d) how dark the writing is
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.⚖️ 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
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
6. 6.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
7. 7.True or false: salt is needed for a seed to sprout. (a) True (b) False
8. 8.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a magnet (c) moong seeds (d) a mirror
10. 10.True or false: an adult with an iron is not needed for the secret lemon message. (a) False (b) True
11. 11.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🫧 Which of these is a base? (a) vinegar (b) salt water (c) plain water (d) soap solution
13. 13.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it makes salt (c) it takes much longer (d) it is much faster
14. 14.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
16. 16.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) wet seeds in the dark (c) seeds on dry cotton (d) boiled seeds
17. 17.True or false: orange juice is an acid. (a) True (b) False
18. 18.🫗 Which of these is done by evaporating? (a) mud from water (b) salt from sea water (c) gravel from fine sand (d) chaff from wheat grain
19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
20. 20.True or false: warm water is something yeast needs. (a) False (b) True
21. 21.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) False (b) True
23. 23.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
24. 24.True or false: cooking oil does not dissolve in water. (a) True (b) False
25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
26. 26.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) turmeric powder
28. 28.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a comb (b) an empty bottle (c) baking soda (d) a funnel or spoon
29. 29.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a battery cell (c) a tray for spills (d) an empty bottle
30. 30.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a potted plant (d) a mirror
32. 32.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) lemon juice (d) vinegar
35. 35.🔍 Which is the odd one out? (a) melting ice (b) milk turning to curd (c) rusting iron (d) browning lemon ink
36. 36.True or false: glucose powder does not dissolve in water. (a) True (b) False
37. 37.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
38. 38.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) muddy water (c) a mirror (d) turmeric powder
39. 39.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) sunlight (d) a battery cell

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