Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 46 · 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 — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
3. 3.True or false: sand and pebbles is not needed for the muddy water filter. (a) False (b) True
4. 4.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it turns blue (d) it grows faster
5. 5.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
6. 6.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
10. 10.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) sugar
11. 11.🫧 Which of these is a base? (a) detergent water (b) vinegar (c) curd (d) orange juice
12. 12.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) False (b) True
14. 14.True or false: sugar dissolves in water. (a) True (b) False
15. 15.True or false: salt water is a base. (a) True (b) False
16. 16.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
17. 17.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) helium (d) carbon dioxide
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
21. 21.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) it grows bigger (d) there is no change
22. 22.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) it turned into air (c) the paper ate it (d) the ink is magnetic
23. 23.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
24. 24.🌱 Which of these is not needed for a seed to sprout? (a) soil (b) air (c) water (d) warmth
25. 25.True or false: yeast is needed for the leafy bag test. (a) True (b) False
26. 26.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
27. 27.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) yeast (c) a battery cell (d) a magnet
28. 28.True or false: baking a cake is a change that can be undone. (a) True (b) False
29. 29.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
30. 30.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) husk from rice grain (c) small stones from dal (d) bran from wheat flour
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
32. 32.⚖️ 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) the size of the plant (d) the kind of plant
33. 33.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
34. 34.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) dissolving salt (d) milk turning to curd
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a magnet (d) white paper
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a mirror (c) sunlight (d) a clear plastic bag
38. 38.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a magnet (c) a funnel or spoon (d) vinegar
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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