Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 503 · 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.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the ironing time
3. 3.True or false: reading the message is a job for an adult. (a) True (b) False
4. 4.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a rubber band (c) a few hours (d) a magnet
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
8. 8.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
11. 11.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) tea leaves from tea (c) bad grains from rice (d) gravel from fine sand
12. 12.True or false: warm water is something yeast needs. (a) False (b) True
13. 13.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a magnet (c) sand and pebbles (d) a battery cell
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a balloon (d) a dropper or spoon
16. 16.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) sugar (d) time
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.True or false: lemon juice is an acid. (a) False (b) True
19. 19.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
20. 20.True or false: salt water is a base. (a) True (b) False
21. 21.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) leaves pass through (c) both stay behind (d) tea stays behind
22. 22.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
23. 23.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
24. 24.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a rubber band (c) sunlight (d) a few hours
25. 25.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) sand and pebbles (c) muddy water (d) yeast
26. 26.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) how hard we shake
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) lemon juice (d) soap solution
28. 28.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the same dish (b) the kind of salt (c) sunny or shady place (d) the amount of salt
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) a cotton bud (c) a small bowl (d) white paper
31. 31.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
32. 32.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a few hours (c) sunlight (d) a clear plastic bag
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a few hours (d) a battery cell
35. 35.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.True or false: take in water from soil is a job of the stem. (a) True (b) False
38. 38.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
39. 39.🧈 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
40. 40.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed

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