Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 475 · 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: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) ghee (d) still runny cream
2. 2.True or false: orange juice is neutral. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) browning lemon ink (b) milk turning to curd (c) dissolving salt (d) baking a cake
4. 4.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) sugar (d) glucose powder
5. 5.True or false: gravel from fine sand is done by sieving. (a) True (b) False
6. 6.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it grows bigger (c) it shrinks (d) there is no change
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) False (b) True
8. 8.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) vinegar (c) a seed (d) a mirror
9. 9.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) add baking soda (d) rub it hard
10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
12. 12.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the kind of plant
14. 14.⚖️ 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 ironing time (c) the kind of juice
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) how dark the writing is (c) the same cotton bud (d) the kind of juice
16. 16.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it is too big (d) it can block breathing
17. 17.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they grow fruit (c) they do not sprout (d) they glow
18. 18.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) vinegar (d) plain water
19. 19.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) it is only melting (c) yes, a new gas forms (d) it is only dissolving
20. 20.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a comb (c) a battery cell (d) an empty bottle
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a battery cell (d) a small bottle
22. 22.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) it glows in the dark (c) lots of fizzy bubbles (d) nothing at all
23. 23.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
24. 24.⚖️ 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
25. 25.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
26. 26.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a sieve (c) a mathani (churner) (d) a pressure cooker
27. 27.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) a mirror (d) a clear plastic bag
28. 28.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) time (d) salt
29. 29.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) musical (c) physical (d) magnetic
30. 30.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) it fills with soil (c) exactly the same (d) much more water
31. 31.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a balloon (c) a mirror (d) cotton wool
32. 32.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) leaves stay behind (d) both stay behind
33. 33.True or false: cutting the lemon is a job for an adult. (a) True (b) False
34. 34.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
35. 35.True or false: sugar water keeps turmeric yellow. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) salt (d) sunlight
37. 37.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) lemon juice (d) detergent water
38. 38.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
39. 39.🔍 Which is the odd one out? (a) soap solution (b) curd (c) vinegar (d) lemon juice
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) sugar (d) a funnel or spoon

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