Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 442 · 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.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a balloon (d) warm water
3. 3.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) a small bottle (d) dry yeast
5. 5.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
6. 6.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) salt (d) sunlight
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) sugar (c) a mirror (d) a comb
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) size of the balloon
10. 10.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
11. 11.🔍 Which is the odd one out? (a) time (b) sunlight (c) vinegar (d) a magnet
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
13. 13.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
14. 14.⚖️ 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 sugar (b) size of the balloon (c) the water temperature (d) the amount of yeast
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) turmeric powder
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
17. 17.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
18. 18.True or false: sugar is something yeast needs. (a) False (b) True
19. 19.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) a small bottle (d) warm water
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
23. 23.⚖️ 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
24. 24.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a mirror (d) sugar
30. 30.⚖️ 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
31. 31.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to make it heavy (d) to colour it
32. 32.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
34. 34.True or false: time is something yeast needs. (a) False (b) True
35. 35.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) salt (d) a magnet
36. 36.⚖️ 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 amount of water (c) the water temperature (d) size of the balloon
37. 37.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
38. 38.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a magnet (d) a balloon
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True

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