Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 191 · 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 an acid? (a) tamarind water (b) baking soda water (c) salt water (d) sugar water
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a mirror (d) a small bottle
3. 3.⚖️ 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
4. 4.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) mud from water (c) sugar from sugar water (d) bran from wheat flour
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
6. 6.🫗 Which of these is done by handpicking? (a) small stones from dal (b) chaff from wheat grain (c) bran from wheat flour (d) sugar from sugar water
7. 7.True or false: mud from water is done by evaporating. (a) True (b) False
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) turmeric powder (d) a small bowl
9. 9.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a paper clip (d) dry yeast
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) warm water (d) salt
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) dry yeast (d) sugar
13. 13.True or false: cooking an egg is a change that can be undone. (a) False (b) True
14. 14.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) warmth (d) sugar
15. 15.🔍 Which is the odd one out? (a) rusting iron (b) dissolving salt (c) milk turning to curd (d) cooking an egg
16. 16.🪴 Which part of a plant does this job: give out water vapour? (a) roots (b) flower (c) leaves (d) stem
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
19. 19.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
20. 20.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
21. 21.True or false: ironing the paper is a job a child can do. (a) False (b) True
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
24. 24.🫗 How do we separate salt from sea water? (a) evaporating (b) sieving (c) handpicking (d) filtering
25. 25.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
26. 26.True or false: bad grains from rice is done by handpicking. (a) True (b) False
27. 27.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) white paper (c) lemon juice (d) an adult with an iron
28. 28.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) give out water vapour (c) make seeds (d) hold the plant in soil
29. 29.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) a balloon (c) yeast (d) cotton wool
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a balloon (c) a bowl (d) a magnet
34. 34.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) vinegar (d) lemon juice
35. 35.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) baking soda
36. 36.True or false: food colour dissolves in water. (a) False (b) True
37. 37.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the same bowls (c) the same place (d) how many seeds sprout
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the amount of cream (c) the cream temperature
39. 39.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) warm water
40. 40.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a battery cell (c) cotton or cloth (d) muddy water

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