Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 581 · 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 balloon is not needed for sprouting seeds. (a) False (b) True
2. 2.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a magnet (d) a mirror
5. 5.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) browning lemon ink (c) freezing water (d) folding paper
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a clean glass (c) cotton or cloth (d) a battery cell
7. 7.🫗 Which of these is done by winnowing? (a) mud from water (b) husk from rice grain (c) gravel from fine sand (d) salt from sea water
8. 8.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting butter (d) folding paper
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a clear plastic bag (c) a few hours (d) a rubber band
10. 10.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
12. 12.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it takes much longer (c) it turns pink (d) it makes salt
13. 13.🔮 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
14. 14.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) water (d) a balloon
16. 16.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a magnet (c) a balloon (d) a clean glass
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) moong seeds (c) turmeric powder (d) a small bowl
19. 19.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
20. 20.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) water (d) a balloon
21. 21.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
22. 22.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
23. 23.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
24. 24.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) cutting the lemon (d) dipping the cotton bud
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) yeast (c) a cotton bud (d) an adult with an iron
27. 27.⚖️ 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
28. 28.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
30. 30.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) sugar
31. 31.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) sand and pebbles (c) a mirror (d) a clean glass
32. 32.🧺 Do we need a battery cell for the secret lemon message? (a) not needed (b) needed
33. 33.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
34. 34.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a clear plastic bag (c) a potted plant (d) a mirror
35. 35.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) lumps of butter (c) sugar crystals (d) bubbles of gas
36. 36.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
37. 37.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) clearer (d) salty
38. 38.📘 What do we call a seed starting to grow? (a) pollination (b) germination (c) evaporation (d) condensation
39. 39.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
40. 40.True or false: a battery cell is not needed for the secret lemon message. (a) True (b) False

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