Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 491 · 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.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it makes salt (c) it turns pink (d) it takes much longer
2. 2.🔍 Which is the odd one out? (a) sawdust (b) sand (c) small pebbles (d) food colour
3. 3.True or false: soap solution is an acid. (a) True (b) False
4. 4.🧺 Which of these is not needed for sprouting seeds? (a) turmeric powder (b) water (c) a small bowl (d) a few days
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) how hard we shake (b) time to make butter (c) the cream temperature
6. 6.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) yeast (c) a small bowl (d) a mirror
7. 7.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) salt
8. 8.🫧 Which of these is an acid? (a) orange juice (b) baking soda water (c) sugar water (d) salt water
9. 9.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) time (d) warm water
11. 11.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) as tight as possible (c) with sharp wire (d) with a hot glue gun
12. 12.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
13. 13.True or false: chaff from wheat grain is done by handpicking. (a) False (b) True
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) size of the balloon (c) the same bottle (d) the amount of vinegar
15. 15.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False
16. 16.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) an ingredient ran out (d) the balloon got cold
17. 17.True or false: baking a cake is a change that can be undone. (a) False (b) True
18. 18.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
19. 19.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, in the dark (c) no, it stays brown (d) yes, if shaken
20. 20.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the mud (d) the salt
21. 21.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) food colour (d) glucose powder
22. 22.True or false: a balloon is needed for making butter. (a) True (b) False
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a comb (c) a funnel or spoon (d) a tray for spills
26. 26.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) it fills with soil (d) much more water
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a battery cell (d) white paper strips
28. 28.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) yeast (d) a mirror
29. 29.True or false: tea leaves from tea is done by filtering. (a) False (b) True
30. 30.🫧 Which of these is an acid? (a) detergent water (b) tamarind water (c) plain water (d) salt water
31. 31.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) sugar (c) a tray for spills (d) an empty bottle
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the same bottles
34. 34.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it changes colour (c) it is too big (d) it gets wet
35. 35.🎈 Why does the balloon blow up? (a) gas is made inside (b) outside air gets in (c) vinegar is hot (d) the bottle shrinks
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a rubber band (d) vinegar
37. 37.True or false: writing the message is a job a child can do. (a) False (b) True
38. 38.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) reflection (c) germination (d) digestion
39. 39.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
40. 40.True or false: a mirror is needed for sprouting seeds. (a) True (b) False

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