Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 345 · 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.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) blue words (c) a rainbow (d) dark brown words
2. 2.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
3. 3.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) water (d) soil
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) sunny or shady place (c) days to see crystals (d) the kind of salt
5. 5.🔍 Which is the odd one out? (a) salt (b) soil (c) sugar (d) warmth
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
7. 7.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a mirror (c) a small bowl (d) a battery cell
8. 8.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) lemon juice (d) yeast
10. 10.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) seeds in the freezer
11. 11.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the size of the plant (c) amount of water drops
12. 12.True or false: freezing water is a change that cannot be undone. (a) True (b) False
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a mirror (c) a few hours (d) turmeric powder
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) an empty bottle (d) a comb
16. 16.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
18. 18.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) orange juice (d) soap solution
19. 19.🔍 Which is the odd one out? (a) writing the message (b) dipping the cotton bud (c) ironing the paper (d) letting the paper dry
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 salt
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🫧 Which of these is neutral? (a) plain water (b) lemon juice (c) curd (d) vinegar
23. 23.True or false: salt is something yeast needs. (a) True (b) False
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
25. 25.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sawdust (d) food colour
26. 26.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it turns pink (c) it makes salt (d) it is much faster
27. 27.⚖️ 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 measure it (c) we change it
28. 28.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
29. 29.📘 What do we call a seed starting to grow? (a) germination (b) pollination (c) evaporation (d) condensation
30. 30.True or false: detergent water is a base. (a) False (b) True
31. 31.🫗 Which of these is done by filtering? (a) bran from wheat flour (b) mud from water (c) sugar from sugar water (d) small stones from dal
32. 32.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
33. 33.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
34. 34.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
35. 35.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
36. 36.🫗 How do we separate bran from wheat flour? (a) filtering (b) handpicking (c) evaporating (d) sieving
37. 37.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a battery cell (c) turmeric powder (d) a dropper or spoon
38. 38.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) sugar (d) warm water
40. 40.⚖️ 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 keep it the same (c) we measure it

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