Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 131 · 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: seeds in the freezer sprouts in a few days. (a) False (b) True
2. 2.True or false: salt water is an acid. (a) False (b) True
3. 3.True or false: fresh cream is needed for making butter. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) letting the paper dry (d) putting the iron away
5. 5.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) detergent water (d) sugar water
6. 6.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.🔍 Which is the odd one out? (a) browning lemon ink (b) cooking an egg (c) milk turning to curd (d) freezing water
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of salt
10. 10.🔍 Which is the odd one out? (a) writing the message (b) letting the paper dry (c) dipping the cotton bud (d) plugging in the iron
11. 11.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) a battery cell (d) a clean glass
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) a piece of string
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) dry yeast
14. 14.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) no butter forms (c) it turns to cheese (d) it turns blue
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
17. 17.True or false: a balloon is not needed for sprouting seeds. (a) False (b) True
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) turmeric powder
19. 19.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
20. 20.🪴 Which part of a plant does this job: take in water from soil? (a) stem (b) flower (c) leaves (d) roots
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) sugar (c) an empty bottle (d) baking soda
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is what we measure. (a) False (b) True
24. 24.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) turmeric powder (c) a mirror (d) yeast
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False
26. 26.True or false: sugar water is neutral. (a) False (b) True
27. 27.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
28. 28.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
29. 29.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) bubbles of gas (c) clear water only (d) lumps of butter
30. 30.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is sweet (d) clear water is salty
31. 31.True or false: soap solution is an acid. (a) True (b) False
32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
33. 33.🫧 Which of these is neutral? (a) orange juice (b) sugar water (c) baking soda water (d) lemon juice
34. 34.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
35. 35.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) wet seeds by a window (c) seeds on wet cotton (d) seeds on dry cotton
36. 36.⚖️ 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
37. 37.True or false: turmeric powder is needed for making butter. (a) False (b) True
38. 38.True or false: small pebbles does not dissolve in water. (a) False (b) True
39. 39.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
40. 40.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) a magnet

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