Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 147 · 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.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) nothing is needed (d) wash hands afterwards
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a funnel or spoon (c) a balloon (d) a mirror
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
5. 5.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
6. 6.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) muddier (c) salty (d) hot
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a piece of string
8. 8.True or false: muddy water is not needed for the muddy water filter. (a) False (b) True
9. 9.True or false: fresh cream is not needed for making butter. (a) True (b) False
10. 10.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
11. 11.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a funnel (c) muddy water (d) a mirror
12. 12.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.True or false: a seed is needed for the fizzy balloon. (a) False (b) True
14. 14.True or false: sugar water is a base. (a) False (b) True
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) shaking adds salt (d) fat bits stick together
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the kind of balloon (c) the same bottle (d) size of the balloon
18. 18.True or false: a timer is not needed for making butter. (a) False (b) True
19. 19.True or false: cooking oil dissolves in water. (a) False (b) True
20. 20.🧺 Do we need a timer for making butter? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a battery cell (c) a rubber band (d) a clear plastic bag
22. 22.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) yeast (c) a jar with a tight lid (d) a timer
24. 24.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
25. 25.🪴 Which part of a plant does this job: make seeds? (a) roots (b) leaves (c) stem (d) flower
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) warm water (d) a comb
29. 29.🫧 Which of these is a base? (a) baking soda water (b) tamarind water (c) curd (d) plain water
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the same glass (c) the amount poured (d) the filter material
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) wet seeds by a window (c) boiled seeds (d) seeds in the freezer
33. 33.True or false: salt is something yeast does not need. (a) True (b) False
34. 34.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
35. 35.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) oxygen (d) carbon dioxide
36. 36.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
37. 37.True or false: sugar is needed for a seed to sprout. (a) True (b) False
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) salt water
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a mirror
40. 40.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) bright red (d) blue

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