Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 604 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
2. 2.🎈 Why does the balloon blow up? (a) vinegar is hot (b) the bottle shrinks (c) gas is made inside (d) outside air gets in
3. 3.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
4. 4.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a seed (c) vinegar (d) a comb
6. 6.True or false: chalk powder does not dissolve in water. (a) False (b) True
7. 7.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
9. 9.True or false: a mirror is not needed for the secret lemon message. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
12. 12.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
13. 13.True or false: sugar water is neutral. (a) False (b) True
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the amount of water (c) the amount of salt (d) the kind of salt
15. 15.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) lick your fingers (c) rub your eyes (d) skip washing
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.True or false: a few days is needed for sprouting seeds. (a) False (b) True
18. 18.True or false: sugar does not dissolve in water. (a) True (b) False
19. 19.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) butter lumps (c) ghee (d) cheese
20. 20.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to clean floors (d) to colour rice
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
23. 23.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) folding paper (d) baking a cake
24. 24.🫗 Which of these is done by winnowing? (a) mud from water (b) husk from rice grain (c) tea leaves from tea (d) small stones from dal
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) the same place (c) how many seeds sprout
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
27. 27.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) ignore it (d) rub it hard
28. 28.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
29. 29.True or false: a mirror is not needed for the leafy bag test. (a) False (b) True
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) a battery cell (d) a clean glass
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a cotton bud (c) lemon juice (d) yeast
34. 34.True or false: curd is an acid. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) reading the message (b) putting the iron away (c) dipping the cotton bud (d) letting the paper dry
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) a small bowl (c) a cotton bud (d) white paper
37. 37.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
38. 38.🍋 Which of these steps is a job for an adult? (a) writing the message (b) dipping the cotton bud (c) ironing the paper (d) letting the paper dry
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same

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