Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 59 · 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 what we measure? (a) the amount of yeast (b) the water temperature (c) the amount of sugar (d) size of the balloon
2. 2.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
4. 4.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) sugar crystals (c) lumps of butter (d) bubbles of gas
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) melting butter
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a magnet (c) a potted plant (d) a clear plastic bag
7. 7.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) an empty bottle (c) sugar (d) a balloon
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the amount of vinegar (b) size of the balloon (c) spoons of baking soda
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
10. 10.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
11. 11.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is sweet (d) clear water is hot
12. 12.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) sunlight (d) water
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
14. 14.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a few hours (c) a battery cell (d) yeast
17. 17.🫗 Which of these is done by filtering? (a) gravel from fine sand (b) husk from rice grain (c) sugar from sugar water (d) mud from water
18. 18.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
21. 21.⚖️ 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) False (b) True
22. 22.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a magnet (d) a balloon
26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
27. 27.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
30. 30.🧺 Which of these is needed for making butter? (a) fresh cream (b) a magnet (c) a mirror (d) a balloon
31. 31.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) cotton wool (c) moong seeds (d) turmeric powder
32. 32.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it shrinks (d) it turns blue
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month
34. 34.True or false: water is not needed for the turmeric test. (a) False (b) True
35. 35.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) turmeric powder (c) a clear plastic bag (d) a mirror
36. 36.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is sticky (c) it is magnetic (d) it is cold
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) sugar (d) a battery cell
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) dry yeast (d) a paper clip
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) how hard we shake (c) the cream temperature

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