Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 872 · 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 fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) a balloon (d) a funnel or spoon
2. 2.🌱 What comes out of a moong seed first when it sprouts? (a) a tiny root (b) a flower (c) a thorn (d) a fruit
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
4. 4.🫧 Which of these is neutral? (a) vinegar (b) soap solution (c) lemon juice (d) salt water
5. 5.🔍 Which is the odd one out? (a) melting butter (b) rusting iron (c) freezing water (d) dissolving salt
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) an empty bottle (d) a seed
7. 7.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) orange juice (d) salt water
8. 8.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) cooking oil (d) baking soda
10. 10.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) a battery cell (d) white paper
11. 11.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
12. 12.🫗 How do we separate chaff from wheat grain? (a) winnowing (b) sieving (c) filtering (d) handpicking
13. 13.True or false: yeast is needed for making butter. (a) True (b) False
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
15. 15.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) soap solution (d) plain water
16. 16.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) sugar (d) vinegar
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
22. 22.True or false: a battery cell is needed for the secret lemon message. (a) False (b) True
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) False (b) True
24. 24.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a jar with a tight lid (d) a battery cell
25. 25.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) browning lemon ink (d) milk turning to curd
26. 26.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
27. 27.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a rubber band (c) vinegar (d) a clear plastic bag
28. 28.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) size of the balloon (d) the amount of yeast
30. 30.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) green (d) brown
33. 33.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
34. 34.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
35. 35.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
36. 36.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
37. 37.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they react (d) they become magnets
38. 38.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
39. 39.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
40. 40.True or false: warm water is something yeast needs. (a) False (b) True

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