Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 738 · 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.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a potted plant (d) vinegar
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to colour rice (d) to make bread rise
4. 4.🫗 How do we separate bran from wheat flour? (a) filtering (b) handpicking (c) winnowing (d) sieving
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
6. 6.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a clear plastic bag (c) a mirror (d) yeast
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) white paper (c) a small bowl (d) turmeric powder
9. 9.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) gently, not too tight (d) with sharp wire
10. 10.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
11. 11.True or false: salt is not needed for a seed to sprout. (a) True (b) False
12. 12.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
14. 14.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) it turns blue (d) more butter forms
15. 15.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
18. 18.True or false: a balloon is not needed for sprouting seeds. (a) True (b) False
19. 19.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
20. 20.🫧 Which of these is neutral? (a) curd (b) detergent water (c) salt water (d) orange juice
21. 21.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a mirror (d) a battery cell
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.True or false: sunlight is not needed for a seed to sprout. (a) False (b) True
24. 24.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
25. 25.⚖️ 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) False (b) True
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) air (b) soil (c) salt (d) sunlight
28. 28.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the same glass (c) how clear the water is (d) the filter material
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the kind of juice (c) how dark the writing is (d) the ironing time
32. 32.🧺 Which of these is needed for making butter? (a) a mirror (b) a timer (c) a balloon (d) a magnet
33. 33.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
34. 34.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) salty (d) hot
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) amount of water drops (b) the size of the plant (c) the time we wait (d) the same kind of bag
36. 36.🍋 Which of these steps is a job for an adult? (a) writing the message (b) letting the paper dry (c) dipping the cotton bud (d) cutting the lemon
37. 37.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
38. 38.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a magnet (c) a mirror (d) a rubber band
39. 39.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
40. 40.True or false: air is needed for a seed to sprout. (a) True (b) False

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