Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 608 · 40 questions

What you do (Yeast is alive): 1. Pour warm (not hot) water into the bottle — an adult checks it. 2. Add the yeast and the sugar and swirl gently. 3. Stretch the balloon over the bottle’s mouth. 4. Wait 30 minutes, measure the balloon, then pour the mixture away and wash up.

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) the amount of water (c) size of the balloon
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) ice cold (d) very salty
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) turmeric powder (c) sugar (d) a balloon
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a balloon (d) warm water
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) dry yeast (d) warm water
8. 8.⚖️ 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 water temperature (b) the amount of yeast (c) the amount of sugar (d) size of the balloon
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a comb
10. 10.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
11. 11.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
12. 12.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
14. 14.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a small bottle (d) a magnet
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a mirror (d) a small bottle
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
18. 18.True or false: sunlight is something yeast does not need. (a) True (b) False
19. 19.🧺 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 paper clip
20. 20.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) a magnet (d) sunlight
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
23. 23.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
25. 25.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold kills sugar (d) cold water is heavy
26. 26.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sugar (d) salt
27. 27.True or false: a magnet is something yeast needs. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) sugar (d) warm water
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a balloon (d) a mirror
31. 31.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
32. 32.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
33. 33.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
37. 37.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
38. 38.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) sugar (d) a mirror
40. 40.True or false: a balloon is needed for the yeast balloon. (a) False (b) True

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