Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 492 · 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.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) time (d) salt
2. 2.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) ironing the paper (d) cutting the lemon
3. 3.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) carbon dioxide (d) oxygen
4. 4.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) ironing the paper (b) letting the paper dry (c) cutting the lemon (d) plugging in the iron
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) turmeric powder (d) a funnel
7. 7.True or false: yeast is needed for making butter. (a) True (b) False
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) size of the balloon (c) the same bottle (d) spoons of baking soda
10. 10.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) skip washing (d) wash your hands
11. 11.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) white paper strips (d) turmeric powder
14. 14.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
15. 15.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it turns yellow (c) so cream does not spill (d) so it gets hot
16. 16.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
17. 17.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
18. 18.🫗 Which of these is done by winnowing? (a) mud from water (b) bran from wheat flour (c) husk from rice grain (d) gravel from fine sand
19. 19.🫗 Which of these is done by handpicking? (a) salt from sea water (b) tea leaves from tea (c) mud from water (d) bad grains from rice
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
22. 22.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a battery cell (c) yeast (d) white paper
23. 23.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) yes, they sprout (c) they melt (d) they turn to stones
24. 24.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the same jar (c) how hard we shake (d) the amount of cream
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) True (b) False
27. 27.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) take in water from soil (c) carry water upward (d) make food in sunlight
30. 30.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it is too big (c) it gets wet (d) it changes colour
31. 31.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they do not sprout (b) they grow fruit (c) they sprout faster (d) they glow
32. 32.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) an empty bottle (c) a magnet (d) a battery cell
33. 33.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) cooking an egg (d) freezing water
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the amount of water (c) the same dish (d) sunny or shady place
36. 36.True or false: a battery cell is not needed for sprouting seeds. (a) True (b) False
37. 37.True or false: salt is not needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a bowl (c) yeast (d) a battery cell
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True

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