Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 635 · 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 the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a tray for spills (c) a balloon (d) a magnet
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
3. 3.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) yeast (c) a bowl (d) cold water to rinse
4. 4.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a potted plant (c) turmeric powder (d) a few hours
5. 5.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) yeast (c) a balloon (d) lemon juice
7. 7.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) oxygen (c) hydrogen (d) carbon dioxide
8. 8.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) the youngest child (c) whoever is fastest (d) only an adult
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) warm water (d) a shallow dish
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
11. 11.⚖️ 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) days to see crystals (b) the kind of salt (c) the amount of salt (d) sunny or shady place
12. 12.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
14. 14.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
16. 16.True or false: yeast is needed for sprouting seeds. (a) True (b) False
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) sugar (b) vinegar (c) baking soda (d) a balloon
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) make food in sunlight (c) take in water from soil (d) give out water vapour
20. 20.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
21. 21.True or false: husk from rice grain is done by handpicking. (a) False (b) True
22. 22.True or false: tamarind water is neutral. (a) True (b) False
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, in the dark (d) yes, if cooled
25. 25.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) sand and pebbles (c) turmeric powder (d) cotton or cloth
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) table salt (d) baking soda
28. 28.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) an ingredient ran out (d) the gas froze
29. 29.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) turmeric powder (c) a cotton bud (d) lemon juice
30. 30.🧺 Which of these is needed for the turmeric test? (a) a comb (b) lemon juice (c) a mirror (d) a balloon
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
32. 32.True or false: rusting iron is a change that can be undone. (a) False (b) True
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) True (b) False
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
37. 37.🌱 Which of these is not needed for a seed to sprout? (a) sunlight (b) warmth (c) air (d) water
38. 38.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) it is only melting (d) yes, a new gas forms
39. 39.🔍 Which is the odd one out? (a) sugar (b) salt (c) a magnet (d) vinegar
40. 40.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the leaves (d) the rain

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids