Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 620 · 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 fizzy balloon? (a) not needed (b) needed
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) time to make butter (c) the cream temperature (d) how hard we shake
3. 3.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
4. 4.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
5. 5.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) heat adds colour (c) the iron is brown (d) paper turns lemony
6. 6.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
7. 7.True or false: take in water from soil is a job of the roots. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) milk turning to curd (b) baking a cake (c) cooking an egg (d) melting butter
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) a balloon (c) a few days (d) cotton wool
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) the same bottle (c) size of the balloon (d) the amount of vinegar
13. 13.True or false: moong seeds is not needed for sprouting seeds. (a) False (b) True
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a mirror (c) a potted plant (d) a clear plastic bag
15. 15.True or false: yeast is needed for the secret lemon message. (a) True (b) False
16. 16.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
17. 17.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
18. 18.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
20. 20.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a comb (c) a battery cell (d) a funnel or spoon
22. 22.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) a cotton bud (d) an adult with an iron
23. 23.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) folding paper (d) melting ice
24. 24.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
25. 25.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
26. 26.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
27. 27.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a few hours (c) a magnet (d) vinegar
28. 28.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
31. 31.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
32. 32.🪴 Which part of a plant does this job: make seeds? (a) roots (b) stem (c) flower (d) leaves
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
34. 34.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is cold (c) yes, always (d) yes, if it is clear
35. 35.True or false: a battery cell is needed for the secret lemon message. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) melting butter (b) folding paper (c) freezing water (d) rusting iron
37. 37.⚖️ 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 iron setting (c) the kind of juice
38. 38.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) cold water to rinse (c) a timer (d) a balloon
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) freezing water (d) melting butter

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