Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 71 · 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: a battery cell is needed for the secret lemon message. (a) False (b) True
2. 2.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) soap solution (d) vinegar
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) sand and pebbles (d) turmeric powder
5. 5.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
6. 6.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) blue (d) pale yellow
7. 7.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) browning lemon ink (d) dissolving salt
8. 8.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
9. 9.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
10. 10.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) food colour (d) sawdust
13. 13.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) flower (c) leaves (d) roots
14. 14.🪴 Which part of a plant does this job: make seeds? (a) roots (b) flower (c) stem (d) leaves
15. 15.True or false: give out water vapour is a job of the leaves. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) melting ice (b) folding paper (c) rusting iron (d) dissolving salt
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a comb (d) a magnet
19. 19.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) smoke (d) steam
20. 20.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
21. 21.🫧 Which of these is a base? (a) salt water (b) vinegar (c) sugar water (d) baking soda water
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) warm water (d) a mirror
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) sugar water (b) vinegar (c) soap solution (d) plain water
25. 25.🫧 Which of these is a base? (a) curd (b) salt water (c) vinegar (d) detergent water
26. 26.True or false: bad grains from rice is done by winnowing. (a) False (b) True
27. 27.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves pass through (c) both stay behind (d) leaves stay behind
28. 28.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
29. 29.🧺 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) vinegar (d) a potted plant
30. 30.🫗 Which of these is done by sieving? (a) small stones from dal (b) husk from rice grain (c) gravel from fine sand (d) bad grains from rice
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
32. 32.True or false: yeast is not needed for sprouting seeds. (a) True (b) False
33. 33.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
34. 34.🫗 How do we separate gravel from fine sand? (a) winnowing (b) sieving (c) filtering (d) evaporating
35. 35.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) yes, they sprout (d) they turn to stones
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a small bottle (c) a magnet (d) turmeric powder
37. 37.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a mirror (c) a few hours (d) a clear plastic bag
40. 40.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral

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