Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 546 · 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.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) how hard we shake (c) time to make butter (d) the amount of cream
2. 2.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
4. 4.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
6. 6.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) turmeric powder (d) a timer
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.True or false: plugging in the iron is a job for an adult. (a) True (b) False
9. 9.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
11. 11.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
12. 12.True or false: a balloon is not needed for sprouting seeds. (a) False (b) True
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) cotton or cloth (c) a funnel (d) muddy water
14. 14.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
17. 17.🫧 Which of these is neutral? (a) tamarind water (b) soap solution (c) lemon juice (d) plain water
18. 18.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it shrinks (c) it turns blue (d) it grows bigger
19. 19.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no water (c) they are too wet (d) they have no salt
20. 20.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) sunlight (d) a magnet
22. 22.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it floats on top (c) it turns to sand (d) it dissolves
23. 23.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) mud from water (c) sugar from sugar water (d) bad grains from rice
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
26. 26.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
27. 27.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects
28. 28.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) germination (c) reflection (d) transpiration
29. 29.True or false: hold up the leaves is a job of the stem. (a) False (b) True
30. 30.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) roots (c) leaves (d) stem
31. 31.True or false: soap solution is neutral. (a) False (b) True
32. 32.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a mirror (b) a bowl (c) fresh cream (d) a jar with a tight lid
35. 35.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) salt
36. 36.🫗 How do we separate small stones from dal? (a) filtering (b) handpicking (c) sieving (d) winnowing
37. 37.🫧 Which of these is an acid? (a) vinegar (b) salt water (c) plain water (d) detergent water
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
40. 40.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) melting butter (d) baking a cake

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