Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 223 · 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 cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the amount of cream (c) time to make butter (d) the same jar
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
3. 3.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny water drops (d) tiny insects
4. 4.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) reflection (c) digestion (d) germination
5. 5.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) seal it in a glass jar (d) put it in your mouth
6. 6.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) vinegar
7. 7.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) melting butter (d) folding paper
8. 8.True or false: warm water is something yeast does not need. (a) True (b) False
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a magnet (d) a timer
13. 13.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
14. 14.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
15. 15.🫧 Which of these is neutral? (a) salt water (b) vinegar (c) soap solution (d) lemon juice
16. 16.True or false: a magnet is something yeast does not need. (a) False (b) True
17. 17.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) soap solution (d) vinegar
18. 18.True or false: baking soda dissolves in water. (a) False (b) True
19. 19.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on wet cotton (d) seeds on dry cotton
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) food colour (d) baking soda
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
23. 23.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🔍 Which is the odd one out? (a) soil (b) salt (c) water (d) sunlight
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) a magnet (d) turmeric powder
27. 27.🍋 Which of these steps is a job for an adult? (a) writing the message (b) reading the message (c) letting the paper dry (d) plugging in the iron
28. 28.True or false: a few days is not needed for sprouting seeds. (a) False (b) True
29. 29.True or false: baking soda is needed for the fizzy balloon. (a) True (b) False
30. 30.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
31. 31.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
32. 32.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
33. 33.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
35. 35.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) a magnet (c) a few days (d) yeast
36. 36.🫗 How do we separate tea leaves from tea? (a) handpicking (b) evaporating (c) winnowing (d) filtering
37. 37.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they do not sprout (c) they glow (d) they sprout faster
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) spoons of baking soda (c) size of the balloon (d) the amount of vinegar
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a magnet (d) a balloon

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