Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 996 · 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.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
2. 2.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) water (d) a balloon
3. 3.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) sunny or shady place
7. 7.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they turn to stones (c) they melt (d) yes, they sprout
8. 8.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
9. 9.🧈 Why does shaking cream make butter? (a) the lid is warm (b) shaking adds salt (c) the jar adds butter (d) fat bits stick together
10. 10.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds by a window (c) seeds on dry cotton (d) wet seeds in the dark
11. 11.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it turns to ice (c) it glows in the dark (d) lots of fizzy bubbles
12. 12.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) turmeric powder (c) a comb (d) a magnet
13. 13.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) plain water (d) baking soda water
14. 14.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
15. 15.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) how hard we shake
17. 17.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) salt (d) vinegar
18. 18.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
19. 19.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) an empty bottle (d) a battery cell
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) yes, if it is clear (c) yes, always (d) no, germs may stay
22. 22.🔍 Which is the odd one out? (a) reading the message (b) letting the paper dry (c) writing the message (d) plugging in the iron
23. 23.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
24. 24.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
25. 25.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
26. 26.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
27. 27.True or false: baking soda water is neutral. (a) True (b) False
28. 28.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) table salt (b) food colour (c) cooking oil (d) glucose powder
31. 31.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a magnet (d) a bowl
32. 32.🎈 Why does the balloon blow up? (a) vinegar is hot (b) the bottle shrinks (c) outside air gets in (d) gas is made inside
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) a small bowl (d) a battery cell
34. 34.🔍 Which is the odd one out? (a) freezing water (b) baking a cake (c) melting butter (d) folding paper
35. 35.🔍 Which is the odd one out? (a) curd (b) sugar water (c) vinegar (d) lemon juice
36. 36.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
38. 38.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
39. 39.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed

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