Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 980 · 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 muddy water filter. (a) False (b) True
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a balloon (c) a comb (d) an empty bottle
3. 3.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) roots (c) stem (d) leaves
4. 4.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
5. 5.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) the same bowls (c) wet or dry cotton (d) the number of seeds
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
7. 7.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) blue (c) dark green (d) pale yellow
8. 8.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns to cheese (c) more butter forms (d) it turns blue
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a magnet (c) a balloon (d) a seed
10. 10.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so air gets out (c) so it gets hot (d) so cream does not spill
11. 11.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) the ink is magnetic (d) dry juice is see-through
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the same dish
13. 13.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) salt water (d) plain water
14. 14.🔍 Which is the odd one out? (a) baking soda water (b) plain water (c) soap solution (d) detergent water
15. 15.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with a hot glue gun (d) with sharp wire
16. 16.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
17. 17.🧺 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
18. 18.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) the balloon bursts (c) it turns to honey (d) a huge eruption
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) warm water (d) a comb
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🔍 Which is the odd one out? (a) rusting iron (b) folding paper (c) baking a cake (d) browning lemon ink
23. 23.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is sticky (c) it is magnetic (d) it is cold
24. 24.True or false: cutting the lemon is a job a child can do. (a) True (b) False
25. 25.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a battery cell (c) a balloon (d) cold water to rinse
26. 26.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) make food in sunlight (c) take in water from soil (d) make seeds
27. 27.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) the youngest child (c) only an adult (d) whoever is fastest
28. 28.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the salt (d) the water
29. 29.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) carbon dioxide (c) hydrogen (d) oxygen
30. 30.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
31. 31.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) a few hours (d) a mirror
33. 33.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
34. 34.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
35. 35.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
36. 36.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) flower (c) leaves (d) stem
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) True (b) False
38. 38.True or false: vinegar is an acid. (a) True (b) False
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) cooking an egg (b) melting butter (c) baking a cake (d) browning lemon ink

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