Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 121 · 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.⚖️ 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 measure it (c) we change it
2. 2.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
3. 3.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
4. 4.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) ironing the paper (c) writing the message (d) plugging in the iron
5. 5.True or false: white paper is needed for the secret lemon message. (a) False (b) True
6. 6.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
7. 7.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the ironing time (c) the kind of juice (d) the iron setting
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) vinegar (d) sugar water
11. 11.🍋 Which of these steps is a job for an adult? (a) reading the message (b) letting the paper dry (c) ironing the paper (d) dipping the cotton bud
12. 12.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) water (d) sugar
13. 13.⚖️ 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) True (b) False
14. 14.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
15. 15.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) vinegar (d) sunlight
16. 16.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) salt water (d) tamarind water
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the amount of vinegar (c) the kind of balloon (d) spoons of baking soda
18. 18.🫧 Which of these is neutral? (a) tamarind water (b) curd (c) lemon juice (d) salt water
19. 19.True or false: vinegar is an acid. (a) False (b) True
20. 20.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) sieving (c) filtering (d) winnowing
21. 21.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
22. 22.🫗 Which of these is done by winnowing? (a) sugar from sugar water (b) mud from water (c) gravel from fine sand (d) husk from rice grain
23. 23.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) turmeric powder (d) a clear plastic bag
24. 24.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
25. 25.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) neither of them (c) both the same (d) the cool cloudy day
26. 26.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) thick whipped cream (c) clear water (d) powder
27. 27.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) tamarind water (d) orange juice
28. 28.True or false: writing the message is a job for an adult. (a) False (b) True
29. 29.🔮 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
30. 30.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) time
31. 31.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) an ingredient ran out (d) the bottle got tired
32. 32.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) a balloon (d) soap solution
33. 33.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
34. 34.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) lemon juice (d) orange juice
37. 37.True or false: ironing the paper is a job for an adult. (a) False (b) True
38. 38.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
39. 39.True or false: vinegar keeps turmeric yellow. (a) False (b) True
40. 40.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) white paper strips (d) a battery cell

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