Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 281 · 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.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
2. 2.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) lemon juice (d) salt water
3. 3.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) cooking oil (d) table salt
4. 4.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
5. 5.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
6. 6.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) small stones from dal (c) gravel from fine sand (d) chaff from wheat grain
7. 7.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a battery cell (c) yeast (d) a mirror
8. 8.True or false: lemon juice is an acid. (a) False (b) True
9. 9.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
10. 10.⚖️ 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 change it (c) we measure it
11. 11.True or false: baking soda water is an acid. (a) True (b) False
12. 12.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
13. 13.True or false: fresh cream is needed for making butter. (a) True (b) False
14. 14.True or false: orange juice is an acid. (a) True (b) False
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
18. 18.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) much less water (d) it fills with soil
19. 19.🫗 How do we separate sugar from sugar water? (a) filtering (b) winnowing (c) handpicking (d) evaporating
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
21. 21.True or false: air is needed for a seed to sprout. (a) False (b) True
22. 22.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it grows faster (d) it turns to sugar
24. 24.True or false: sawdust dissolves in water. (a) False (b) True
25. 25.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the cool cloudy day (c) neither of them (d) the hot sunny day
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) a balloon (d) a seed
27. 27.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a magnet (c) a mirror (d) a battery cell
28. 28.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) it is food for yeast (d) to make it sweet
29. 29.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) yeast (d) a rubber band
30. 30.🍋 Which of these steps is a job a child can do? (a) letting the paper dry (b) plugging in the iron (c) cutting the lemon (d) putting the iron away
31. 31.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) a mirror (d) an empty bottle
32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
33. 33.True or false: vinegar keeps turmeric yellow. (a) True (b) False
34. 34.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
35. 35.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
36. 36.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
37. 37.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
38. 38.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
39. 39.🧺 Which of these is not needed for the turmeric test? (a) water (b) a mirror (c) a dropper or spoon (d) white paper strips
40. 40.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed

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