Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 845 · 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.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
2. 2.True or false: yeast is needed for the turmeric test. (a) False (b) True
3. 3.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
4. 4.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) neither of them (c) the hot sunny day (d) both the same
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the same bottles (c) size of the balloon
8. 8.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a potted plant (c) a rubber band (d) a few hours
9. 9.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a tray for spills (c) a funnel or spoon (d) a mirror
10. 10.🔍 Which is the odd one out? (a) salt (b) water (c) soil (d) sunlight
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
13. 13.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a dropper or spoon (d) lemon juice
14. 14.⚖️ 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) the size of the plant (b) the kind of plant (c) sun or shade (d) the time we wait
15. 15.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) a few hours (d) yeast
17. 17.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) a funnel or spoon (c) vinegar (d) a tray for spills
19. 19.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) pale yellow (c) dark green (d) bright red
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
22. 22.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to colour it (d) to make it heavy
23. 23.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
24. 24.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) small stones from dal (c) sugar from sugar water (d) chaff from wheat grain
25. 25.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) white paper (c) lemon juice (d) a small bowl
27. 27.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) heat adds colour (c) paper turns lemony (d) the iron is brown
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a balloon (d) salt
29. 29.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) how many seeds sprout (c) wet or dry cotton
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar
31. 31.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) cotton wool (c) turmeric powder (d) a magnet
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) a clean glass (d) a battery cell
33. 33.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) a huge eruption (c) it turns to honey (d) the balloon bursts
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) the same cotton bud (c) how dark the writing is (d) the same paper
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) the amount of cream
36. 36.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: sunlight is something yeast needs. (a) True (b) False
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
40. 40.🫧 Which of these is a base? (a) orange juice (b) plain water (c) soap solution (d) tamarind water

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