Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 990 · 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 done by filtering? (a) chaff from wheat grain (b) mud from water (c) bad grains from rice (d) sugar from sugar water
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
3. 3.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a magnet (c) a potted plant (d) turmeric powder
4. 4.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) roots (d) stem
5. 5.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) heat adds colour (c) paper turns lemony (d) the juice scorches first
6. 6.True or false: give out water vapour is a job of the leaves. (a) False (b) True
7. 7.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
8. 8.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) pale yellow (c) dark green (d) bright red
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) the paper floats (d) it gets darker
12. 12.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) muddy water (c) sand and pebbles (d) cotton or cloth
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) sand and pebbles (c) cotton or cloth (d) muddy water
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a bowl (d) a mirror
16. 16.🫗 Is filtered pond water safe to drink? (a) yes, always (b) no, germs may stay (c) yes, if it is cold (d) yes, if it is clear
17. 17.🫧 Which of these is a base? (a) lemon juice (b) orange juice (c) soap solution (d) plain water
18. 18.⚖️ 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
19. 19.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
20. 20.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) any child (d) the youngest child
21. 21.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
23. 23.🛟 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
24. 24.🫗 Which of these is done by sieving? (a) salt from sea water (b) tea leaves from tea (c) bran from wheat flour (d) mud from water
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) how many seeds sprout (c) wet or dry cotton (d) the same bowls
26. 26.True or false: husk from rice grain is done by winnowing. (a) True (b) False
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) salt (d) a magnet
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
30. 30.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) salt water (d) curd
31. 31.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) vinegar (d) salt water
32. 32.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) yeast (c) a clear plastic bag (d) a mirror
34. 34.🌱 What comes out of a moong seed first when it sprouts? (a) a tiny root (b) a fruit (c) a thorn (d) a flower
35. 35.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
36. 36.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) plain water (d) curd
37. 37.True or false: a mirror is not needed for sprouting seeds. (a) True (b) False
38. 38.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a magnet (c) vinegar (d) sugar
39. 39.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a cotton bud (c) a magnet (d) turmeric powder
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) size of the balloon

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