Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 329 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) dry yeast (d) warm water
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a magnet (d) a balloon
3. 3.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) sugar (d) salt
4. 4.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
5. 5.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) sugar (d) a small bottle
7. 7.⚖️ 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
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the amount of sugar (d) the same bottles
9. 9.⚖️ 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 sugar (c) size of the balloon (d) the amount of yeast
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a mirror
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a paper clip (d) a small bottle
12. 12.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) sugar (c) a small bottle (d) dry yeast
14. 14.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
15. 15.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a balloon (d) a battery cell
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a paper clip (d) sugar
20. 20.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) time
21. 21.🔍 Which is the odd one out? (a) sunlight (b) time (c) salt (d) vinegar
22. 22.⚖️ 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 measure it (c) we change it
23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a balloon (d) a magnet
25. 25.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) sugar (d) a magnet
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 yeast”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.True or false: vinegar is something yeast does not need. (a) False (b) True
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
29. 29.True or false: sunlight is something yeast does not need. (a) False (b) True
30. 30.⚖️ 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) False (b) True
31. 31.True or false: sugar is something yeast needs. (a) False (b) True
32. 32.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
33. 33.True or false: sunlight is something yeast needs. (a) False (b) True
34. 34.True or false: vinegar is something yeast needs. (a) True (b) False
35. 35.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
36. 36.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
38. 38.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.⚖️ 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

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