Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 165 · 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.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a potted plant (c) sunlight (d) a rubber band
3. 3.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
4. 4.True or false: salt is something yeast does not need. (a) False (b) True
5. 5.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the same glass (c) the same funnel (d) how clear the water is
7. 7.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) cutting the lemon (d) dipping the cotton bud
8. 8.🍋 Which of these steps is a job for an adult? (a) writing the message (b) plugging in the iron (c) reading the message (d) dipping the cotton bud
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) True (b) False
10. 10.🪴 Which of these is a job of the stem? (a) make seeds (b) give out water vapour (c) carry water upward (d) make food in sunlight
11. 11.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
12. 12.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.True or false: a battery cell is needed for the muddy water filter. (a) True (b) False
15. 15.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
16. 16.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
17. 17.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) it turns blue (d) there is no change
18. 18.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) turmeric powder (c) moong seeds (d) a battery cell
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
20. 20.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
21. 21.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if shaken (d) yes, if cooled
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns yellow again (d) it turns darker red
24. 24.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) soap solution (d) detergent water
26. 26.True or false: a mirror is needed for sprouting seeds. (a) True (b) False
27. 27.🫗 How do we separate small stones from dal? (a) evaporating (b) sieving (c) winnowing (d) handpicking
28. 28.True or false: letting the paper dry is a job for an adult. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) melting butter (d) folding paper
30. 30.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a balloon (c) a battery cell (d) lemon juice
31. 31.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
32. 32.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) nothing is needed (d) lick your fingers
33. 33.True or false: curd is an acid. (a) False (b) True
34. 34.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
35. 35.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) leaves (c) stem (d) flower
36. 36.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns to cheese (c) no butter forms (d) it turns blue
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🌱 Which of these is needed for a seed to sprout? (a) soil (b) salt (c) sunlight (d) water
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a mirror (d) a potted plant
40. 40.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) dipping the cotton bud (d) putting the iron away

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