Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 333 · 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.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
3. 3.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
6. 6.🧺 Which of these is needed for making butter? (a) yeast (b) a mirror (c) turmeric powder (d) a timer
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) germs are invisible (d) clear water is hot
9. 9.True or false: detergent water is an acid. (a) False (b) True
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
11. 11.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) vinegar (c) a seed (d) baking soda
12. 12.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) fresh cream (c) a timer (d) a magnet
13. 13.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
14. 14.🎈 Why does the balloon blow up? (a) gas is made inside (b) outside air gets in (c) vinegar is hot (d) the bottle shrinks
15. 15.True or false: a few days is not needed for sprouting seeds. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) cooking oil (d) food colour
17. 17.⚖️ 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
18. 18.⚖️ 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 cream temperature (c) how hard we shake (d) time to make butter
19. 19.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
20. 20.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) small pebbles (d) baking soda
21. 21.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.True or false: sugar water is neutral. (a) False (b) True
24. 24.True or false: a mirror is needed for making butter. (a) True (b) False
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is the one thing we change. (a) False (b) True
26. 26.True or false: a jar with a tight lid is not needed for making butter. (a) True (b) False
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) a balloon (d) a small bowl
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
31. 31.True or false: small stones from dal is done by sieving. (a) False (b) True
32. 32.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) as tight as possible (d) gently, not too tight
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) warm water (d) a piece of string
34. 34.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) sand and pebbles (d) yeast
36. 36.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
37. 37.True or false: salt from sea water is done by evaporating. (a) True (b) False
38. 38.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
39. 39.🫗 How do we separate bad grains from rice? (a) sieving (b) winnowing (c) handpicking (d) evaporating
40. 40.🔍 Which is the odd one out? (a) curd (b) plain water (c) sugar water (d) salt water

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