Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 12 · 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.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
2. 2.True or false: folding paper is a change that cannot be undone. (a) True (b) False
3. 3.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns blue (c) it turns to cheese (d) more butter forms
4. 4.🫧 Which of these is an acid? (a) plain water (b) salt water (c) vinegar (d) soap solution
5. 5.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
6. 6.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) vinegar (c) sugar (d) a magnet
7. 7.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
8. 8.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a battery cell
10. 10.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
11. 11.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
12. 12.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
14. 14.🫗 Which of these is done by evaporating? (a) small stones from dal (b) salt from sea water (c) husk from rice grain (d) tea leaves from tea
15. 15.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) plain water (d) detergent water
16. 16.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) folding paper (d) melting ice
17. 17.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) give out water vapour (c) hold the plant in soil (d) carry water upward
18. 18.🔮 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
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) lemon juice (d) a balloon
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.True or false: writing the message is a job a child can do. (a) False (b) True
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a balloon (d) salt
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) sugar (d) dry yeast
26. 26.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
27. 27.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
28. 28.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) paper turns lemony (c) heat adds colour (d) the iron is brown
29. 29.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) a mirror (b) cotton or cloth (c) sand and pebbles (d) a clean glass
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
32. 32.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) reading the message (c) plugging in the iron (d) ironing the paper
33. 33.True or false: cooking an egg is a change that can be undone. (a) True (b) False
34. 34.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a balloon (d) a comb
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) the same muddy water (c) the same glass (d) the filter material
38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
40. 40.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) fresh cream (d) a magnet

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