Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 482 · 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 a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the same muddy water (c) how clear the water is (d) the same glass
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a magnet (c) a small bowl (d) an adult with an iron
3. 3.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
6. 6.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a comb (d) sugar
8. 8.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
9. 9.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) seal it in a glass jar (d) keep it away from eyes
10. 10.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
11. 11.🧺 Which of these is needed for making butter? (a) yeast (b) a mirror (c) a magnet (d) a jar with a tight lid
12. 12.True or false: a battery cell is needed for making butter. (a) False (b) True
13. 13.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) sugar water (d) vinegar
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
15. 15.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is magnetic (d) it is cold
16. 16.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a small bowl (c) a balloon (d) an adult with an iron
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) time to make butter (d) the cream temperature
20. 20.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) the hot sunny day (c) both the same (d) neither of them
21. 21.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) plain water (d) tamarind water
22. 22.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
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 keep it the same (b) we change it (c) we measure it
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda
27. 27.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
28. 28.True or false: wet seeds by a window sprouts in a few days. (a) True (b) False
29. 29.True or false: a battery cell is needed for the leafy bag test. (a) False (b) True
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
31. 31.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
32. 32.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the balloon got cold (c) the gas froze (d) the bottle got tired
33. 33.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a funnel (c) a clean glass (d) yeast
34. 34.⚖️ 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 change it (c) we measure it
35. 35.🫗 Which of these is done by filtering? (a) gravel from fine sand (b) bad grains from rice (c) small stones from dal (d) mud from water
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) melting ice (d) milk turning to curd
37. 37.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
38. 38.True or false: cotton wool is not needed for sprouting seeds. (a) False (b) True
39. 39.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) magnetic (c) chemical (d) physical
40. 40.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) small pebbles (d) table salt

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