Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 208 · 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 kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar
2. 2.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it turns yellow (c) so air gets out (d) so it gets hot
3. 3.🌱 Which of these is needed for a seed to sprout? (a) water (b) salt (c) soil (d) sunlight
4. 4.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
5. 5.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
6. 6.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it floats on top (c) it sinks to the bottom (d) it turns to sand
7. 7.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
8. 8.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) a magnet
9. 9.🧺 Do we need a few days for sprouting seeds? (a) not needed (b) needed
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) yeast (d) white paper strips
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
14. 14.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) ironing the paper (d) dipping the cotton bud
15. 15.🪴 Where did the water inside the bag come from? (a) the leaves (b) the plastic (c) the rubber band (d) the rain
16. 16.🫧 Which of these is neutral? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
17. 17.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
18. 18.🔍 Which is the odd one out? (a) writing the message (b) cutting the lemon (c) dipping the cotton bud (d) letting the paper dry
19. 19.True or false: a comb is needed for the fizzy balloon. (a) False (b) True
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) sugar (d) a comb
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a battery cell (c) lemon juice (d) white paper
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
23. 23.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, in the dark (c) yes, if shaken (d) no, it stays brown
24. 24.True or false: folding paper is a change that cannot be undone. (a) False (b) True
25. 25.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
26. 26.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
27. 27.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) vinegar (c) sugar (d) a balloon
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
33. 33.True or false: water is needed for a seed to sprout. (a) False (b) True
34. 34.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) a huge eruption (c) the balloon bursts (d) it turns to honey
35. 35.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) lemon juice (d) a magnet
37. 37.True or false: boiled seeds does not sprout. (a) False (b) True
38. 38.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
39. 39.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) True (b) False

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