Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 565 · 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 is the odd one out? (a) salt (b) vinegar (c) warm water (d) sunlight
2. 2.⚖️ 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
3. 3.True or false: a mirror is not needed for making butter. (a) True (b) False
4. 4.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) with sharp wire (d) gently, not too tight
5. 5.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
6. 6.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) lick your fingers (d) wash hands afterwards
7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
8. 8.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
9. 9.🫧 Which of these is a base? (a) sugar water (b) curd (c) soap solution (d) orange juice
10. 10.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
11. 11.🔍 Which is the odd one out? (a) curd (b) lemon juice (c) baking soda water (d) vinegar
12. 12.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
13. 13.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) chalk powder
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a mirror (d) a potted plant
16. 16.True or false: a few hours is not needed for the leafy bag test. (a) True (b) False
17. 17.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) both the same (c) neither of them (d) the cool cloudy day
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🔍 Which is the odd one out? (a) water (b) sugar (c) sunlight (d) salt
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) False (b) True
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) the same glass (b) the amount poured (c) how clear the water is (d) the filter material
23. 23.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
25. 25.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of water (d) the amount of yeast
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a battery cell (b) sand and pebbles (c) muddy water (d) a funnel
29. 29.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
30. 30.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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
32. 32.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
34. 34.True or false: a few days is not needed for sprouting seeds. (a) False (b) True
35. 35.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) seal it in a glass jar (d) shake it near your face
36. 36.🔍 Which is the odd one out? (a) browning lemon ink (b) melting ice (c) baking a cake (d) rusting iron
37. 37.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
38. 38.True or false: carry water upward is a job of the flower. (a) True (b) False
39. 39.🧺 Which of these is needed for sprouting seeds? (a) moong seeds (b) turmeric powder (c) a balloon (d) a battery cell
40. 40.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a bowl (c) cold water to rinse (d) yeast

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