Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 970 · 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: sugar is needed for the fizzy balloon. (a) False (b) True
2. 2.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
3. 3.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
4. 4.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) it turns to honey (c) the balloon bursts (d) a huge eruption
7. 7.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) vinegar (d) detergent water
8. 8.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
9. 9.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, in the dark (d) yes, if cooled
10. 10.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) soap solution (d) white paper strips
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a paper clip
13. 13.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
14. 14.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
15. 15.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) an empty bottle (c) a tray for spills (d) sugar
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
17. 17.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) exactly the same (c) it fills with soil (d) much more water
18. 18.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
19. 19.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
20. 20.🫗 How do we separate husk from rice grain? (a) handpicking (b) evaporating (c) sieving (d) winnowing
21. 21.🔍 Which is the odd one out? (a) sugar (b) food colour (c) baking soda (d) sawdust
22. 22.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
24. 24.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) lick your fingers (d) wash hands afterwards
25. 25.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
26. 26.🫧 Which of these is neutral? (a) detergent water (b) sugar water (c) soap solution (d) vinegar
27. 27.True or false: sugar is something yeast does not need. (a) True (b) False
28. 28.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
29. 29.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) sunlight (b) warmth (c) soil (d) sugar
33. 33.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
34. 34.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a mirror (d) white paper
36. 36.True or false: small stones from dal is done by handpicking. (a) False (b) True
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) True (b) False
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) folding paper
40. 40.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed

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