Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 175 · 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.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same glass (c) how clear the water is
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) how hard we shake (c) the amount of cream (d) time to make butter
3. 3.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
4. 4.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) with sharp wire (d) gently, not too tight
5. 5.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) there is no change (d) it shrinks
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
7. 7.True or false: white paper is needed for the secret lemon message. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) yeast (c) a mirror (d) water
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 is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
12. 12.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) vinegar (c) a clear plastic bag (d) a rubber band
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) cold water to rinse (c) fresh cream (d) a magnet
14. 14.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
15. 15.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) putting the iron away (c) cutting the lemon (d) writing the message
16. 16.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
17. 17.🪴 Which of these is a job of the stem? (a) take in water from soil (b) make seeds (c) hold up the leaves (d) make food in sunlight
18. 18.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) paper turns lemony (c) the iron is brown (d) heat adds colour
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same cotton bud (b) the kind of juice (c) how dark the writing is
21. 21.🪴 Which of these is a job of the leaves? (a) make seeds (b) hold up the leaves (c) make food in sunlight (d) hold the plant in soil
22. 22.True or false: a few days is not needed for sprouting seeds. (a) True (b) False
23. 23.True or false: water is needed for a seed to sprout. (a) False (b) True
24. 24.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a seed (c) a magnet (d) a funnel or spoon
25. 25.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
26. 26.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) cooking an egg (d) melting ice
27. 27.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
28. 28.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) baking a cake (d) freezing water
30. 30.🫗 How do we separate tea leaves from tea? (a) handpicking (b) sieving (c) evaporating (d) filtering
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
32. 32.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) freezing water (d) melting ice
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
34. 34.🫗 How do we separate small stones from dal? (a) filtering (b) sieving (c) handpicking (d) evaporating
35. 35.True or false: warm water is something yeast does not need. (a) False (b) True
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) a few hours (d) yeast
37. 37.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🔍 Which is the odd one out? (a) cooking an egg (b) melting butter (c) dissolving salt (d) freezing water
40. 40.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns blue (c) more butter forms (d) it turns to cheese

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