Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 877 · 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 cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the amount poured (c) how clear the water is
2. 2.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) a funnel (c) yeast (d) a clean glass
3. 3.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
4. 4.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) putting the iron away (d) dipping the cotton bud
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) the balloon bursts (c) it turns to honey (d) a huge eruption
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.True or false: melting butter is a change that cannot be undone. (a) True (b) False
12. 12.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) glucose powder
14. 14.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) lemon juice (d) soap solution
15. 15.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) a cotton bud (c) lemon juice (d) white paper
16. 16.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
17. 17.🧂 Which of these dissolves in water? (a) table salt (b) cooking oil (c) chalk powder (d) sand
18. 18.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) dipping the cotton bud (d) plugging in the iron
19. 19.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) almost nothing (c) a rainbow (d) blue words
20. 20.🧺 Do we need a timer for making butter? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a few hours (c) a clear plastic bag (d) a rubber band
22. 22.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) a cotton bud (c) lemon juice (d) white paper
23. 23.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a few hours (c) turmeric powder (d) vinegar
24. 24.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) it is food for yeast (d) to make it sweet
25. 25.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) sugar (c) a funnel or spoon (d) a battery cell
26. 26.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
29. 29.⚖️ 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 amount of yeast (b) the water temperature (c) the amount of sugar (d) size of the balloon
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🔍 Which is the odd one out? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) dissolving salt
32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) sawdust
36. 36.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a battery cell
38. 38.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) a balloon (d) fresh cream
39. 39.True or false: curd is an acid. (a) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False

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