Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 418 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) dry yeast (d) a small bottle
2. 2.True or false: sand dissolves in water. (a) True (b) False
3. 3.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) white paper (c) a cotton bud (d) a small bowl
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🧺 Do we need cold water to rinse for making butter? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) warm water (d) a piece of string
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the kind of seeds (c) the same place (d) how many seeds sprout
8. 8.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) oxygen (c) carbon dioxide (d) helium
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the kind of juice (c) the same paper (d) the same cotton bud
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) vinegar (c) a clear plastic bag (d) a rubber band
11. 11.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
12. 12.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water
13. 13.True or false: detergent water keeps turmeric yellow. (a) False (b) True
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) yeast (c) a few days (d) a small bowl
16. 16.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a mirror (c) a balloon (d) a cotton bud
17. 17.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
18. 18.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) sand and pebbles (c) yeast (d) a mirror
19. 19.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
20. 20.True or false: dissolving salt is a change that can be undone. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🌱 Which of these sprouts in a few days? (a) wet seeds by a window (b) seeds on dry cotton (c) boiled seeds (d) seeds in the freezer
23. 23.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the ironing time (c) how dark the writing is
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
26. 26.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a funnel (c) a mirror (d) muddy water
28. 28.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
29. 29.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
30. 30.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
32. 32.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) water (c) soil (d) sugar
33. 33.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) an adult with an iron (c) a cotton bud (d) a magnet
35. 35.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) a tray for spills (d) an empty bottle
36. 36.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
37. 37.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
38. 38.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
40. 40.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) sawdust

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