Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 201 · 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.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) yeast (c) turmeric powder (d) muddy water
2. 2.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) very little fizzing (c) it turns to honey (d) a huge eruption
3. 3.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is sweet (d) clear water is salty
4. 4.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a seed (c) vinegar (d) a balloon
5. 5.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) the ink is magnetic (d) dry juice is see-through
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) how dark the writing is (c) the kind of juice (d) the iron setting
7. 7.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) water (c) a few days (d) turmeric powder
8. 8.🫗 Which of these is done by filtering? (a) bran from wheat flour (b) mud from water (c) bad grains from rice (d) chaff from wheat grain
9. 9.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
10. 10.⚖️ 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 same muddy water (c) the same funnel (d) the filter material
11. 11.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a rolling pin (c) a mathani (churner) (d) a sieve
12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
14. 14.True or false: plugging in the iron is a job a child can do. (a) True (b) False
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
16. 16.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) add baking soda (d) rinse with clean water
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it can block breathing (d) it is too big
19. 19.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
20. 20.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) white paper strips (d) a dropper or spoon
22. 22.True or false: melting ice is a change that can be undone. (a) False (b) True
23. 23.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) clearer (c) muddier (d) hot
24. 24.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) turmeric powder (d) a cotton bud
25. 25.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves stay behind (c) tea stays behind (d) leaves pass through
26. 26.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
27. 27.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
28. 28.🪴 Where did the water inside the bag come from? (a) the rain (b) the plastic (c) the rubber band (d) the leaves
29. 29.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
32. 32.True or false: a magnet is not needed for making butter. (a) True (b) False
33. 33.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) moong seeds (c) a mirror (d) a balloon
34. 34.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Which of these is not needed for the fizzy balloon? (a) a comb (b) baking soda (c) an empty bottle (d) a balloon
37. 37.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the amount of cream (b) time to make butter (c) the cream temperature
39. 39.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) feed them to pets (d) never put seeds in mouth
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed

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