Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 155 · 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: gravel from fine sand is done by sieving. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) ironing the paper (b) reading the message (c) cutting the lemon (d) putting the iron away
3. 3.True or false: detergent water is a base. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) rusting iron (b) browning lemon ink (c) freezing water (d) cooking an egg
5. 5.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) cold water to rinse (c) turmeric powder (d) a bowl
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) dry yeast (d) sugar
7. 7.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) sand and pebbles (d) a balloon
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
9. 9.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
10. 10.True or false: a magnet is something yeast does not need. (a) False (b) True
11. 11.True or false: tea leaves from tea is done by winnowing. (a) True (b) False
12. 12.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
13. 13.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) germs are invisible (d) clear water is sweet
14. 14.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
16. 16.🪴 Through which part does a plant take in water from the soil? (a) the flowers (b) the fruits (c) the leaves (d) the roots
17. 17.True or false: plugging in the iron is a job for an adult. (a) True (b) False
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
19. 19.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) time to make butter (c) how hard we shake (d) the cream temperature
21. 21.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) salt (d) a battery cell
22. 22.True or false: a comb is not needed for the fizzy balloon. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
24. 24.🪴 Which of these is a job of the leaves? (a) carry water upward (b) hold up the leaves (c) hold the plant in soil (d) make food in sunlight
25. 25.🫗 How do we separate tea leaves from tea? (a) handpicking (b) winnowing (c) sieving (d) filtering
26. 26.True or false: warmth is needed for a seed to sprout. (a) True (b) False
27. 27.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the same kind of bag (c) amount of water drops (d) the time we wait
29. 29.🛟 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
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.True or false: baking soda is not needed for the fizzy balloon. (a) False (b) True
32. 32.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
34. 34.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) oxygen (d) carbon dioxide
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) an adult with an iron (c) a magnet (d) a cotton bud
37. 37.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) lemon juice (c) a battery cell (d) turmeric powder
38. 38.🧺 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) turmeric powder (d) white paper
39. 39.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False
40. 40.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base

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