Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 304 · 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 kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
2. 2.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the salt (d) the mud
3. 3.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) white paper strips (d) a comb
5. 5.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
6. 6.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
7. 7.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) seal it in a glass jar (d) shake it near your face
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) yeast (d) a dropper or spoon
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
11. 11.🫗 How do we separate husk from rice grain? (a) evaporating (b) sieving (c) winnowing (d) handpicking
12. 12.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
13. 13.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
14. 14.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a comb (d) dry yeast
16. 16.True or false: a mirror is not needed for making butter. (a) True (b) False
17. 17.True or false: sugar does not dissolve in water. (a) True (b) False
18. 18.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) no, nothing changes (c) it is only melting (d) it is only dissolving
19. 19.True or false: detergent water is a base. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) dipping the cotton bud (b) ironing the paper (c) reading the message (d) writing the message
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) gas is made inside (c) vinegar is hot (d) outside air gets in
23. 23.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
24. 24.🛟 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
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) sunlight (c) turmeric powder (d) a clear plastic bag
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
29. 29.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
30. 30.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
33. 33.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) both the same (c) the cool cloudy day (d) the hot sunny day
34. 34.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
35. 35.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
38. 38.True or false: a balloon is needed for making butter. (a) False (b) True
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a battery cell (d) yeast

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