Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 391 · 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.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) yeast (c) sand and pebbles (d) cotton or cloth
2. 2.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) sugar (c) soil (d) warmth
3. 3.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
5. 5.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter traps mud (c) the water evaporates (d) the filter adds soap
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.True or false: water is needed for the turmeric test. (a) False (b) True
8. 8.True or false: sugar is something yeast does not need. (a) False (b) True
9. 9.⚖️ 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
10. 10.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it can burn skin (c) it is cold (d) it is sticky
11. 11.🧈 What is the watery liquid left after the butter forms? (a) oil (b) vinegar (c) honey (d) buttermilk
12. 12.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) muddy water (d) a battery cell
13. 13.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) a magnet
14. 14.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
15. 15.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sawdust (d) sugar
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ 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 funnel (c) how clear the water is
18. 18.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) it turns blue (d) no butter forms
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
20. 20.True or false: folding paper is a change that can be undone. (a) True (b) False
21. 21.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) sugar (c) vinegar (d) a seed
22. 22.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) baking soda water (d) soap solution
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the kind of seeds
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a cotton bud (d) a balloon
26. 26.🫧 Which of these is a base? (a) baking soda water (b) vinegar (c) sugar water (d) plain water
27. 27.⚖️ 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
28. 28.True or false: a balloon is needed for the turmeric test. (a) False (b) True
29. 29.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
30. 30.🧺 Which of these is needed for the secret lemon message? (a) a small bowl (b) yeast (c) a battery cell (d) a balloon
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of water (c) the water temperature
32. 32.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
33. 33.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) table salt (d) sand
34. 34.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
35. 35.True or false: melting butter is a change that can be undone. (a) True (b) False
36. 36.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) lemon juice (d) an adult with an iron
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
38. 38.True or false: glucose powder does not dissolve in water. (a) False (b) True
39. 39.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
40. 40.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the same bowls (c) wet or dry cotton

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