Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 352 · 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 more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the same bottle
2. 2.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) tamarind water (d) detergent water
3. 3.True or false: wet seeds in the dark does not sprout. (a) False (b) True
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a small bowl (d) an adult with an iron
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a mirror (c) a magnet (d) turmeric powder
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) take in water from soil (c) carry water upward (d) make food in sunlight
9. 9.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it turns to sand (d) it sinks to the bottom
10. 10.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
11. 11.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a battery cell (c) a magnet (d) cotton or cloth
12. 12.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a rubber band (c) vinegar (d) a battery cell
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
14. 14.True or false: plain water keeps turmeric yellow. (a) False (b) True
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of sugar (c) the amount of water (d) the same bottles
17. 17.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
18. 18.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the same muddy water (d) the filter material
20. 20.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
21. 21.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
22. 22.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a battery cell (c) sand and pebbles (d) a clean glass
23. 23.True or false: soap solution is neutral. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a small bottle (d) a magnet
26. 26.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) the filter material (c) how clear the water is
28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
29. 29.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) hold the plant in soil (c) make seeds (d) give out water vapour
30. 30.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) clear water only (c) bubbles of gas (d) sugar crystals
31. 31.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
32. 32.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) helium (d) carbon dioxide
33. 33.🫧 Which of these is neutral? (a) curd (b) vinegar (c) salt water (d) orange juice
34. 34.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
35. 35.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
36. 36.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a mirror (c) sand and pebbles (d) a balloon
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is kept the same. (a) False (b) True
39. 39.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
40. 40.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False

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