Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 10 · 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 not needed for the fizzy balloon? (a) a funnel or spoon (b) a balloon (c) a mirror (d) an empty bottle
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
3. 3.🔍 Which is the odd one out? (a) milk turning to curd (b) browning lemon ink (c) freezing water (d) rusting iron
4. 4.🛟 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
5. 5.🫗 Which of these is done by filtering? (a) husk from rice grain (b) mud from water (c) small stones from dal (d) bran from wheat flour
6. 6.True or false: a magnet is not needed for the leafy bag test. (a) False (b) True
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
8. 8.True or false: turmeric powder is not needed for the leafy bag test. (a) False (b) True
9. 9.⚖️ 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 filter material (c) the same muddy water
10. 10.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
11. 11.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) small pebbles
12. 12.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
13. 13.⚖️ 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) the amount of salt (c) days to see crystals
14. 14.True or false: gravel from fine sand is done by handpicking. (a) True (b) False
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) amount of water drops (c) sun or shade (d) the same kind of bag
16. 16.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
17. 17.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) sunlight (d) vinegar
19. 19.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) germs are invisible (d) clear water is sweet
20. 20.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) a small bowl (d) lemon juice
21. 21.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
22. 22.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) small pebbles (d) baking soda
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
26. 26.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) flower (c) leaves (d) roots
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a magnet (c) vinegar (d) a funnel or spoon
28. 28.True or false: sand and pebbles is needed for the muddy water filter. (a) False (b) True
29. 29.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) seal it in a glass jar (d) put it in your mouth
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) sieving (c) winnowing (d) filtering
34. 34.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
35. 35.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
36. 36.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
37. 37.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) leaves (c) roots (d) flower
38. 38.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
40. 40.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) lemon juice (c) turmeric powder (d) a balloon

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