Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 383 · 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: plain water turns turmeric reddish-brown. (a) False (b) True
2. 2.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) whoever is fastest (c) only an adult (d) any child
3. 3.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the same paper (c) the same cotton bud (d) the kind of juice
5. 5.🪴 Which part of a plant does this job: make seeds? (a) flower (b) roots (c) stem (d) leaves
6. 6.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a mirror (c) a funnel or spoon (d) vinegar
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the size of the plant
9. 9.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
10. 10.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.True or false: putting the iron away is a job a child can do. (a) True (b) False
13. 13.True or false: a magnet is needed for the secret lemon message. (a) True (b) False
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
15. 15.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it can burn skin (c) it is sticky (d) it is magnetic
16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
17. 17.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
18. 18.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
20. 20.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) almost nothing (d) dark brown words
21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
22. 22.🔍 Which is the odd one out? (a) dissolving salt (b) freezing water (c) folding paper (d) rusting iron
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) germs are invisible (d) clear water is sweet
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) turmeric powder (d) sugar
26. 26.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
27. 27.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
28. 28.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a few hours (c) sunlight (d) a rubber band
29. 29.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a few hours (c) a clear plastic bag (d) vinegar
30. 30.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) putting the iron away (d) letting the paper dry
31. 31.True or false: boiled seeds sprouts in a few days. (a) True (b) False
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) turmeric powder (d) a comb
33. 33.True or false: glucose powder dissolves in water. (a) False (b) True
34. 34.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a magnet (c) a few hours (d) yeast
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) turmeric powder (d) a balloon
36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
37. 37.True or false: gravel from fine sand is done by sieving. (a) True (b) False
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the same bottles (c) the water temperature (d) size of the balloon
39. 39.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) leaves (c) flower (d) stem
40. 40.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts

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