Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 254 · 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.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) a rubber band (d) a magnet
2. 2.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) an adult with an iron (d) white paper
3. 3.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) vinegar (d) salt
4. 4.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a balloon (c) a timer (d) a jar with a tight lid
5. 5.True or false: freezing water is a change that can be undone. (a) False (b) True
6. 6.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) melting ice (d) freezing water
7. 7.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
8. 8.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
9. 9.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
10. 10.True or false: bran from wheat flour is done by sieving. (a) False (b) True
11. 11.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) leaves pass through (d) both stay behind
12. 12.🫗 Which of these is done by handpicking? (a) mud from water (b) husk from rice grain (c) bad grains from rice (d) chaff from wheat grain
13. 13.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
14. 14.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) the same jar
16. 16.True or false: yeast is needed for sprouting seeds. (a) False (b) True
17. 17.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if cooled (d) yes, if shaken
18. 18.🧺 Which of these is not needed for making butter? (a) a battery cell (b) fresh cream (c) a bowl (d) a jar with a tight lid
19. 19.True or false: baking soda water is a base. (a) False (b) True
20. 20.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) sugar from sugar water (c) bad grains from rice (d) small stones from dal
21. 21.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a pulley (d) a prism
22. 22.🎈 Why does the balloon blow up? (a) vinegar is hot (b) the bottle shrinks (c) outside air gets in (d) gas is made inside
23. 23.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
24. 24.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) plain water (d) baking soda water
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) warm water (d) a balloon
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
27. 27.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) warm water (d) a magnet
29. 29.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
30. 30.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True
31. 31.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
33. 33.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they grow fruit (c) they do not sprout (d) they sprout faster
34. 34.🔍 Which is the odd one out? (a) dipping the cotton bud (b) letting the paper dry (c) writing the message (d) cutting the lemon
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
36. 36.True or false: water is not needed for the turmeric test. (a) False (b) True
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) size of the balloon (d) the amount of water
38. 38.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) soap solution (d) sugar water
39. 39.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a dropper or spoon (d) a magnet

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