Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 114 · 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? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) the amount of water (d) size of the balloon
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
4. 4.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) warm water (d) a piece of string
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) False (b) True
7. 7.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a jar with a tight lid (d) a battery cell
9. 9.True or false: bran from wheat flour is done by sieving. (a) False (b) True
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) lumps of butter (c) sugar crystals (d) bubbles of gas
13. 13.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) hold the plant in soil (c) carry water upward (d) make seeds
14. 14.🔍 Which is the odd one out? (a) dissolving salt (b) baking a cake (c) browning lemon ink (d) milk turning to curd
15. 15.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) sand (d) small pebbles
16. 16.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) small pebbles (d) food colour
17. 17.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) germs are invisible (d) clear water is salty
18. 18.True or false: make seeds is a job of the leaves. (a) False (b) True
19. 19.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
21. 21.True or false: freezing water is a change that can be undone. (a) False (b) True
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same funnel
23. 23.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) sugar water (d) soap solution
25. 25.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) tamarind water (d) plain water
26. 26.True or false: sugar does not dissolve in water. (a) False (b) True
27. 27.🫧 Which of these is a base? (a) vinegar (b) plain water (c) salt water (d) baking soda water
28. 28.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
29. 29.🔍 Which is the odd one out? (a) water (b) air (c) warmth (d) soil
30. 30.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda (d) the same bottle
32. 32.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
33. 33.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
35. 35.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) sand and pebbles (d) a mirror
36. 36.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
37. 37.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) small stones from dal (c) sugar from sugar water (d) husk from rice grain
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a mirror (c) sunlight (d) a clear plastic bag
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) a shallow dish

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