Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 423 · 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 of these is needed for making butter? (a) a magnet (b) a bowl (c) turmeric powder (d) a mirror
2. 2.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
3. 3.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
4. 4.🫗 How do we separate chaff from wheat grain? (a) evaporating (b) filtering (c) winnowing (d) sieving
5. 5.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) no, it stays brown (d) yes, in the dark
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the amount of sugar (c) the water temperature (d) the amount of water
7. 7.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) nothing is needed (d) wash hands afterwards
8. 8.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) dark brown words (d) blue words
11. 11.True or false: a magnet is needed for the secret lemon message. (a) False (b) True
12. 12.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
13. 13.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
14. 14.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
15. 15.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a mirror
17. 17.🔍 Which is the odd one out? (a) salt water (b) plain water (c) sugar water (d) detergent water
18. 18.🔍 Which is the odd one out? (a) rusting iron (b) melting butter (c) baking a cake (d) cooking an egg
19. 19.🔍 Which is the odd one out? (a) sugar (b) warmth (c) water (d) air
20. 20.True or false: mud from water is done by handpicking. (a) True (b) False
21. 21.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a rubber band (c) a few hours (d) a clear plastic bag
22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
23. 23.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🧺 Which of these is needed for the fizzy balloon? (a) baking soda (b) a mirror (c) sugar (d) a comb
26. 26.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves stay behind (c) leaves pass through (d) tea stays behind
27. 27.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) ghee (c) cheese (d) butter lumps
28. 28.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) no, salt passes through (d) yes, all of it
29. 29.🧺 Do we need a timer for making butter? (a) not needed (b) needed
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
31. 31.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it turns yellow (c) so air gets out (d) so it gets hot
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) sunlight (d) turmeric powder
33. 33.🔍 Which is the odd one out? (a) soil (b) salt (c) sugar (d) water
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the ironing time
38. 38.🫧 Which of these is a base? (a) curd (b) plain water (c) baking soda water (d) salt water
39. 39.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) outside air gets in (c) gas is made inside (d) vinegar is hot
40. 40.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids