Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 538 · 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.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so air gets out (d) so it turns yellow
2. 2.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) both stay behind (d) leaves stay behind
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) green (d) blue
4. 4.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) no, it stays brown (d) yes, in the dark
5. 5.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
8. 8.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
9. 9.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a magnet (c) turmeric powder (d) a few hours
11. 11.🔍 Which is the odd one out? (a) sugar (b) salt (c) vinegar (d) sunlight
12. 12.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
13. 13.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
14. 14.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) make seeds (c) give out water vapour (d) hold the plant in soil
15. 15.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
16. 16.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) soap solution (c) a dropper or spoon (d) water
17. 17.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
19. 19.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) white paper (c) a cotton bud (d) yeast
20. 20.🪴 Which part of a plant does this job: make food in sunlight? (a) leaves (b) roots (c) flower (d) stem
21. 21.🧺 Which of these is needed for making butter? (a) a timer (b) turmeric powder (c) a mirror (d) yeast
22. 22.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
23. 23.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) small stones from dal (c) gravel from fine sand (d) husk from rice grain
24. 24.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
25. 25.🫗 How do we separate bad grains from rice? (a) sieving (b) winnowing (c) evaporating (d) handpicking
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) False (b) True
27. 27.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) a mirror (d) a battery cell
29. 29.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) writing the message (c) letting the paper dry (d) cutting the lemon
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) True (b) False
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) a balloon (d) a comb
32. 32.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it dissolves (c) it floats on top (d) it sinks to the bottom
33. 33.🔍 Which is the odd one out? (a) freezing water (b) browning lemon ink (c) dissolving salt (d) melting ice
34. 34.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.True or false: cutting the lemon is a job a child can do. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
38. 38.True or false: lemon juice is an acid. (a) False (b) True
39. 39.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) lemon juice (d) a magnet
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same

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