Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 743 · 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.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sunlight (d) vinegar
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a balloon (c) dry yeast (d) a small bottle
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) dry yeast (d) turmeric powder
6. 6.True or false: sugar is something yeast does not need. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) sunlight (b) salt (c) sugar (d) a magnet
8. 8.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
9. 9.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
10. 10.True or false: a magnet is something yeast does not need. (a) True (b) False
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) sugar (d) dry yeast
12. 12.🍞 Does yeast need warm water 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? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) sugar (c) warm water (d) a balloon
15. 15.⚖️ 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) size of the balloon (b) the amount of yeast (c) the water temperature (d) the amount of sugar
16. 16.🧺 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 mirror
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
18. 18.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) a magnet (d) salt
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) sugar (d) a mirror
21. 21.True or false: a magnet is something yeast needs. (a) True (b) False
22. 22.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) sugar (d) a paper clip
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a balloon (d) a paper clip
24. 24.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a battery cell (c) a paper clip (d) a comb
25. 25.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of water
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
28. 28.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
29. 29.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
30. 30.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
31. 31.🔮 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
32. 32.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
34. 34.⚖️ 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) True (b) False
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
36. 36.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
37. 37.True or false: a comb is needed for the yeast balloon. (a) True (b) False
38. 38.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
39. 39.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) warm water (c) a small bottle (d) dry yeast

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