Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 820 · 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: lemon juice is neutral. (a) True (b) False
2. 2.True or false: husk from rice grain is done by handpicking. (a) True (b) False
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) still runny cream (d) ghee
5. 5.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
6. 6.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they float apart (d) they become magnets
7. 7.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops
8. 8.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) orange juice (d) baking soda water
9. 9.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
10. 10.True or false: a battery cell is not needed for making butter. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
12. 12.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is sweet (d) clear water is hot
13. 13.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
14. 14.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) a rainbow (c) blue words (d) dark brown words
15. 15.🧈 Before the butter appears, what does the cream turn into? (a) powder (b) clear water (c) thick whipped cream (d) ice
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the amount poured (c) the filter material (d) how clear the water is
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🔮 Predict: the adult irons for only one second. What happens? (a) writing stays faint (b) writing turns green (c) the paper floats (d) it gets darker
20. 20.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
21. 21.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) the hot sunny day (d) neither of them
22. 22.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
23. 23.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
24. 24.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a mirror (c) a bowl (d) a jar with a tight lid
26. 26.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a magnet (c) a battery cell (d) a few hours
27. 27.🧺 Which of these is not needed for sprouting seeds? (a) water (b) a small bowl (c) turmeric powder (d) a few days
28. 28.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) baking soda (d) sawdust
29. 29.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
30. 30.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
31. 31.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
32. 32.🌱 What comes out of a moong seed first when it sprouts? (a) a fruit (b) a tiny root (c) a flower (d) a thorn
33. 33.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a balloon (c) a funnel (d) muddy water
34. 34.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.True or false: mud from water is done by handpicking. (a) True (b) False
37. 37.🫗 How do we separate husk from rice grain? (a) filtering (b) sieving (c) winnowing (d) handpicking
38. 38.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) gently, not too tight (d) with sharp wire
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) False (b) True
40. 40.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes

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