Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 647 · 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.⚖️ 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 change it (c) we measure it
2. 2.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) dark green (c) blue (d) pale yellow
3. 3.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) a balloon (d) white paper strips
4. 4.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) an adult with an iron (d) turmeric powder
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
6. 6.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🔍 Which is the odd one out? (a) ironing the paper (b) cutting the lemon (c) dipping the cotton bud (d) plugging in the iron
9. 9.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
10. 10.True or false: soap solution is an acid. (a) False (b) True
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) brown (d) white
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the same muddy water (d) the filter material
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.True or false: yeast is needed for the leafy bag test. (a) True (b) False
16. 16.True or false: a mirror is not needed for making butter. (a) False (b) True
17. 17.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) a balloon (d) sugar
20. 20.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) flower (c) leaves (d) roots
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) dissolving salt (d) milk turning to curd
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) the same place (c) the same bowls (d) wet or dry cotton
24. 24.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) melting ice (d) melting butter
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) False (b) True
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a shallow dish (d) a balloon
27. 27.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) roots (c) stem (d) leaves
28. 28.⚖️ 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
29. 29.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) the same bottle (c) spoons of baking soda (d) size of the balloon
31. 31.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) cooking an egg (d) milk turning to curd
32. 32.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they do not sprout (c) they glow (d) they grow fruit
33. 33.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) carry water upward (c) make seeds (d) make food in sunlight
34. 34.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) oxygen (c) helium (d) hydrogen
40. 40.True or false: sugar is not needed for a seed to sprout. (a) True (b) False

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