Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 573 · 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 lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
2. 2.🧺 Do we need a battery cell for sprouting seeds? (a) needed (b) not needed
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) spoons of baking soda (c) the kind of balloon (d) size of the balloon
4. 4.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) yeast (c) a timer (d) fresh cream
5. 5.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a pressure cooker (c) a mathani (churner) (d) a rolling pin
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
7. 7.🫧 Which of these is neutral? (a) soap solution (b) detergent water (c) lemon juice (d) plain water
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) a magnet (d) a timer
9. 9.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) lemon juice
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a funnel or spoon (c) baking soda (d) a battery cell
12. 12.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
13. 13.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
14. 14.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) plain water (d) detergent water
16. 16.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) yes, in the dark (d) no, it stays brown
17. 17.⚖️ 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
18. 18.True or false: small pebbles does not dissolve in water. (a) False (b) True
19. 19.True or false: a mirror is needed for sprouting seeds. (a) False (b) True
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the filter material (c) the amount poured (d) the same muddy water
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a mirror (c) a small bowl (d) a cotton bud
24. 24.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
25. 25.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) plugging in the iron (c) ironing the paper (d) dipping the cotton bud
26. 26.True or false: ironing the paper is a job a child can do. (a) False (b) True
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a balloon (c) a funnel (d) sand and pebbles
29. 29.True or false: wet seeds in the dark does not sprout. (a) False (b) True
30. 30.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) the youngest child (c) only an adult (d) whoever is fastest
31. 31.🧺 Which of these is not needed for the fizzy balloon? (a) a magnet (b) a funnel or spoon (c) a tray for spills (d) vinegar
32. 32.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the light we look in
34. 34.🫗 How do we separate small stones from dal? (a) sieving (b) winnowing (c) evaporating (d) handpicking
35. 35.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) folding paper (d) rusting iron
39. 39.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the juice scorches first (c) the iron is brown (d) heat adds colour
40. 40.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a battery cell (c) yeast (d) a small bowl

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