Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 313 · 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.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) yeast (c) moong seeds (d) cotton wool
2. 2.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) yeast (d) fresh cream
3. 3.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
4. 4.True or false: melting butter is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) a piece of string (d) salt
6. 6.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
8. 8.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) ghee (c) cheese (d) still runny cream
9. 9.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
10. 10.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on wet cotton (c) seeds in the freezer (d) wet seeds by a window
11. 11.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) True (b) False
12. 12.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
14. 14.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it grows faster (d) it turns blue
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) False (b) True
17. 17.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a magnet (c) cotton or cloth (d) a clean glass
18. 18.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
19. 19.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same muddy water (c) the filter material
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) reading the message (b) plugging in the iron (c) dipping the cotton bud (d) letting the paper dry
24. 24.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) food colour (d) sawdust
25. 25.🔍 Which is the odd one out? (a) rusting iron (b) cooking an egg (c) melting butter (d) browning lemon ink
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the same paper (c) the iron setting (d) the kind of juice
27. 27.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
28. 28.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) a magnet (d) water
29. 29.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
30. 30.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.True or false: a comb is needed for the yeast balloon. (a) True (b) False
32. 32.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves pass through (c) both stay behind (d) leaves stay behind
33. 33.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) salt water (d) sugar water
34. 34.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) physical (d) chemical
35. 35.True or false: give out water vapour is a job of the leaves. (a) True (b) False
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the size of the plant (b) sun or shade (c) the time we wait (d) amount of water drops
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of salt
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the same bottles (c) size of the balloon (d) the amount of yeast
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) the amount of cream

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