Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 726 · 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 must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so cream does not spill (d) so it turns yellow
2. 2.🌱 Which of these is needed for a seed to sprout? (a) salt (b) soil (c) air (d) sugar
3. 3.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a few days (c) a small bowl (d) a balloon
4. 4.🧺 Which of these is needed for the fizzy balloon? (a) an empty bottle (b) a seed (c) a magnet (d) sugar
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) True (b) False
6. 6.🧺 Which of these is needed for making butter? (a) a balloon (b) cold water to rinse (c) a battery cell (d) yeast
7. 7.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a rubber band (c) a few hours (d) vinegar
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
9. 9.True or false: water is needed for the turmeric test. (a) False (b) True
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
12. 12.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) cold water to rinse (c) a battery cell (d) a jar with a tight lid
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the ironing time (c) the same cotton bud (d) the kind of juice
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a tray for spills (c) baking soda (d) a mirror
17. 17.True or false: sugar is something yeast needs. (a) False (b) True
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) dry yeast (d) a comb
19. 19.True or false: a magnet is not needed for the leafy bag test. (a) True (b) False
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
23. 23.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the roots (c) the leaves (d) the flowers
24. 24.🫧 Which of these is neutral? (a) lemon juice (b) detergent water (c) plain water (d) orange juice
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a magnet (c) cold water to rinse (d) a jar with a tight lid
26. 26.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) folding paper (d) melting butter
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same funnel (c) the filter material
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
31. 31.🫗 Which of these is done by winnowing? (a) chaff from wheat grain (b) tea leaves from tea (c) salt from sea water (d) bad grains from rice
32. 32.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
33. 33.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
34. 34.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) reading the message (d) letting the paper dry
35. 35.True or false: a bowl is not needed for making butter. (a) True (b) False
36. 36.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) False (b) True
38. 38.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) blue (c) green (d) white
39. 39.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) the mud (d) nothing
40. 40.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True

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