Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 458 · 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 plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the same kind of bag (c) the time we wait (d) sun or shade
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
3. 3.🧺 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
4. 4.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
5. 5.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
6. 6.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) gently, not too tight (d) with sharp wire
7. 7.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) steam (d) air from outside
8. 8.🧺 Do we need a timer for making butter? (a) needed (b) not needed
9. 9.⚖️ 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
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a paper clip
12. 12.⚖️ 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 amount poured
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a seed (c) a balloon (d) an empty bottle
14. 14.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is hot (c) clear water is salty (d) germs are invisible
15. 15.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) helium (c) carbon dioxide (d) hydrogen
16. 16.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) turmeric powder (d) a paper clip
17. 17.🔍 Which is the odd one out? (a) table salt (b) food colour (c) baking soda (d) small pebbles
18. 18.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
19. 19.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) exactly the same (c) much less water (d) much more water
22. 22.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) sawdust (d) baking soda
23. 23.🪴 Which of these is a job of the flower? (a) carry water upward (b) take in water from soil (c) make seeds (d) hold up the leaves
24. 24.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
25. 25.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) tiny water drops (d) nothing at all
26. 26.🫧 Which of these is a base? (a) baking soda water (b) sugar water (c) salt water (d) curd
27. 27.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) a balloon (d) a bowl
28. 28.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
29. 29.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
31. 31.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) soap solution (d) a magnet
32. 32.True or false: curd is a base. (a) True (b) False
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) fresh cream (c) a bowl (d) yeast
35. 35.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a magnet (c) a funnel (d) muddy water
36. 36.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
37. 37.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
38. 38.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
39. 39.True or false: cooking an egg is a change that can be undone. (a) False (b) True
40. 40.🫗 How do we separate tea leaves from tea? (a) sieving (b) handpicking (c) evaporating (d) filtering

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