Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 723 · 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.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
4. 4.True or false: detergent water is an acid. (a) False (b) True
5. 5.True or false: wet seeds by a window does not sprout. (a) True (b) False
6. 6.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) food colour (d) sugar
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a dropper or spoon (d) a balloon
9. 9.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) reflection (c) transpiration (d) digestion
10. 10.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
11. 11.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
12. 12.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) warm water (d) salt
15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
16. 16.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) gas is made inside (c) vinegar is hot (d) outside air gets in
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the amount of vinegar (c) spoons of baking soda (d) the kind of balloon
18. 18.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) it fills with soil (c) exactly the same (d) much less water
19. 19.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
20. 20.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) True (b) False
22. 22.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
23. 23.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a battery cell (d) a paper clip
24. 24.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
25. 25.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
26. 26.True or false: fresh cream is not needed for making butter. (a) True (b) False
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the same bottles (c) the amount of sugar (d) size of the balloon
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
34. 34.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) yes, in the dark (d) no, it stays brown
35. 35.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
36. 36.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
39. 39.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
40. 40.True or false: curd is a base. (a) True (b) False

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