Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 840 · 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: a magnet is not needed for the fizzy balloon. (a) False (b) True
2. 2.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) leaves stay behind (d) tea stays behind
3. 3.⚖️ 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 iron setting
4. 4.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the cool cloudy day (c) both the same (d) the hot sunny day
5. 5.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) white paper (c) a balloon (d) a mirror
6. 6.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) ghee (d) still runny cream
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) how dark the writing is (c) the kind of juice
9. 9.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) True (b) False
11. 11.True or false: melting butter is a change that can be undone. (a) True (b) False
12. 12.True or false: turmeric powder is not needed for the leafy bag test. (a) False (b) True
13. 13.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
14. 14.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) physical (d) chemical
15. 15.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) the juice scorches first (d) heat adds colour
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
18. 18.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a magnet (c) vinegar (d) a mirror
19. 19.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) chaff from wheat grain (c) bad grains from rice (d) gravel from fine sand
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) sun or shade (c) the kind of plant (d) the same kind of bag
21. 21.True or false: plugging in the iron is a job for an adult. (a) False (b) True
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a mirror (d) a spoon
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) yeast (d) a bowl
24. 24.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a small bottle (d) a mirror
26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
27. 27.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) sugar (c) air (d) soil
32. 32.⚖️ 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 time we wait
33. 33.🫧 Which of these is an acid? (a) detergent water (b) soap solution (c) tamarind water (d) plain water
34. 34.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if shaken (c) yes, if cooled (d) no, it stays brown
35. 35.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
36. 36.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it makes salt (c) it turns pink (d) it is much faster
37. 37.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) soap solution (d) tamarind water
38. 38.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) salt from sea water (c) gravel from fine sand (d) husk from rice grain
39. 39.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it turns blue (d) it disappears
40. 40.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) soil (c) sugar (d) water

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