Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 730 · 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 making butter. Which one is NOT needed? (a) a timer (b) a balloon (c) a bowl (d) cold water to rinse
2. 2.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
3. 3.True or false: sugar is something yeast needs. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) time
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) turmeric powder (d) a dropper or spoon
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
7. 7.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
9. 9.True or false: baking a cake is a change that can be undone. (a) True (b) False
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) a clean glass (d) a battery cell
11. 11.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) tamarind water
12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
13. 13.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) put it in your mouth (d) seal it in a glass jar
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
15. 15.True or false: take in water from soil is a job of the flower. (a) False (b) True
16. 16.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a few days (c) a balloon (d) cotton wool
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the amount poured (c) how clear the water is
18. 18.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
19. 19.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) wet or dry cotton (c) the same place (d) the same bowls
20. 20.True or false: yeast is needed for the muddy water filter. (a) True (b) False
21. 21.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) carbon dioxide (c) hydrogen (d) oxygen
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) turmeric powder (c) a funnel (d) muddy water
24. 24.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
25. 25.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
26. 26.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
30. 30.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
31. 31.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
32. 32.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) it turns to honey (c) the balloon bursts (d) a huge eruption
33. 33.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
34. 34.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a balloon (c) white paper (d) a cotton bud
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) vinegar (c) an empty bottle (d) a magnet
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the same paper (c) the ironing time (d) how dark the writing is
39. 39.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True

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