Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 719 · 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 yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.True or false: writing the message is a job for an adult. (a) True (b) False
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) dry yeast (d) warm water
4. 4.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) stem (c) flower (d) roots
5. 5.🧺 Which of these is needed for the secret lemon message? (a) a cotton bud (b) a balloon (c) a battery cell (d) a magnet
6. 6.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
7. 7.⚖️ 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 funnel (c) the same glass (d) how clear the water is
8. 8.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a balloon (c) a magnet (d) baking soda
9. 9.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
10. 10.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) baking a cake (d) melting ice
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) False (b) True
12. 12.⚖️ 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
13. 13.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
14. 14.True or false: fresh cream is needed for making butter. (a) False (b) True
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) a potted plant (d) a battery cell
16. 16.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) False (b) True
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.True or false: a magnet is needed for making butter. (a) True (b) False
20. 20.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
23. 23.True or false: melting butter is a change that cannot be undone. (a) True (b) False
24. 24.True or false: soil is not needed for a seed to sprout. (a) False (b) True
25. 25.🫗 Which of these is done by sieving? (a) small stones from dal (b) bad grains from rice (c) bran from wheat flour (d) chaff from wheat grain
26. 26.🔍 Which is the odd one out? (a) orange juice (b) lemon juice (c) plain water (d) tamarind water
27. 27.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
28. 28.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
29. 29.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they become magnets (c) they freeze (d) they float apart
30. 30.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) vinegar (d) plain water
31. 31.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
32. 32.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much more water (c) much less water (d) it fills with soil
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) an adult with an iron (d) a small bowl
34. 34.🔍 Which is the odd one out? (a) sand (b) sugar (c) food colour (d) glucose powder
35. 35.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
37. 37.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) it turns blue (d) there is no change
38. 38.True or false: a comb is not needed for the fizzy balloon. (a) True (b) False
39. 39.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) sunlight (d) vinegar
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False

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