Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 371 · 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 more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
2. 2.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
3. 3.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) leaves (c) stem (d) roots
4. 4.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
5. 5.🫧 Which of these is neutral? (a) lemon juice (b) plain water (c) vinegar (d) curd
6. 6.True or false: take in water from soil is a job of the roots. (a) False (b) True
7. 7.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) carbon dioxide (c) oxygen (d) helium
8. 8.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects
9. 9.🪴 Which of these is a job of the flower? (a) give out water vapour (b) make seeds (c) take in water from soil (d) make food in sunlight
10. 10.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns to cheese (c) it turns blue (d) no butter forms
11. 11.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
12. 12.🔍 Which is the odd one out? (a) reading the message (b) dipping the cotton bud (c) writing the message (d) ironing the paper
13. 13.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) a magnet (d) time
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the amount poured (c) the filter material (d) the same funnel
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) False (b) True
16. 16.True or false: make seeds is a job of the stem. (a) True (b) False
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
18. 18.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
19. 19.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) yes, if it is clear (d) no, germs may stay
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
21. 21.🌱 Which of these is needed for a seed to sprout? (a) water (b) soil (c) sugar (d) sunlight
22. 22.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) the same jar (c) time to make butter (d) the cream temperature
24. 24.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) a magnet
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) moong seeds (c) yeast (d) cotton wool
26. 26.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
27. 27.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) germs are invisible (d) clear water is sweet
28. 28.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a pressure cooker (d) a sieve
29. 29.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) air (d) soil
31. 31.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) letting the paper dry (d) cutting the lemon
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) white paper strips (d) soap solution
33. 33.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) baking a cake
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a mirror (c) cold water to rinse (d) fresh cream
35. 35.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
36. 36.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) heat adds colour (d) the juice scorches first
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a rubber band (c) a clear plastic bag (d) a few hours
38. 38.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) lemon juice (c) a balloon (d) white paper
39. 39.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) husk from rice grain (c) bran from wheat flour (d) small stones from dal
40. 40.True or false: a magnet is not needed for the turmeric test. (a) False (b) True

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