Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 34 · 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.🫧 Which of these is neutral? (a) baking soda water (b) curd (c) plain water (d) detergent water
2. 2.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is the one thing we change. (a) True (b) False
3. 3.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) cold water to rinse (d) turmeric powder
6. 6.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
7. 7.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) add baking soda (d) rub it hard
9. 9.True or false: soap solution keeps turmeric yellow. (a) False (b) True
10. 10.🎈 Why does the balloon blow up? (a) outside air gets in (b) gas is made inside (c) vinegar is hot (d) the bottle shrinks
11. 11.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
12. 12.🧺 Which of these is not needed for the fizzy balloon? (a) a comb (b) vinegar (c) a funnel or spoon (d) a balloon
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) vinegar (c) a few hours (d) a clear plastic bag
15. 15.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
17. 17.🔍 Which is the odd one out? (a) baking soda water (b) curd (c) soap solution (d) detergent water
18. 18.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
19. 19.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
20. 20.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) soap solution (d) plain water
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of water
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
23. 23.⚖️ 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) True (b) False
24. 24.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) water (b) sunlight (c) warmth (d) air
26. 26.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
28. 28.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) time (d) salt
29. 29.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
30. 30.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda
32. 32.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) with sharp wire (d) as tight as possible
33. 33.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) orange juice (d) plain water
34. 34.🫗 How do we separate salt from sea water? (a) sieving (b) handpicking (c) evaporating (d) filtering
35. 35.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) salt (d) water
36. 36.🌱 Where does a sprouting seed get its first food from? (a) the air (b) the cotton wool (c) food stored in the seed (d) the sunlight only
37. 37.True or false: make food in sunlight is a job of the stem. (a) False (b) True
38. 38.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) yes, a new gas forms (c) it is only dissolving (d) no, nothing changes
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) folding paper (d) freezing water
40. 40.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True

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