Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 313 · 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.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.⚖️ 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) size of the balloon (c) the amount of sugar (d) the water temperature
4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
5. 5.⚖️ 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 sugar (b) the same bottles (c) the water temperature (d) size of the balloon
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
8. 8.True or false: salt is something yeast does not need. (a) False (b) True
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a comb (d) sugar
10. 10.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) a paper clip (d) a mirror
11. 11.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
14. 14.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) a small bottle (d) dry yeast
16. 16.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
17. 17.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
18. 18.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
19. 19.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
21. 21.True or false: sugar is needed for the yeast balloon. (a) False (b) True
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) a balloon
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) a balloon (d) warm water
25. 25.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) time
26. 26.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
27. 27.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
28. 28.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) warm water (d) a magnet
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
32. 32.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) sugar
33. 33.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
34. 34.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
35. 35.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
36. 36.⚖️ 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 yeast
37. 37.True or false: warm water is something yeast does not need. (a) True (b) False
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) sugar (d) a battery cell
40. 40.⚖️ 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

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