Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 693 · 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.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a magnet (d) sugar
2. 2.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
3. 3.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) a magnet
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
7. 7.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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 same bottles
9. 9.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a balloon (d) a magnet
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) warm water (d) a paper clip
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
14. 14.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
15. 15.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) sugar
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
17. 17.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
19. 19.True or false: warm water is something yeast needs. (a) False (b) True
20. 20.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) a magnet (d) time
22. 22.⚖️ 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
23. 23.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
25. 25.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
27. 27.True or false: a magnet is something yeast needs. (a) True (b) False
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
29. 29.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
30. 30.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.⚖️ 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
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
33. 33.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) sugar (b) salt (c) sunlight (d) vinegar
35. 35.⚖️ 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) True (b) False
36. 36.True or false: a magnet is something yeast does not need. (a) True (b) False
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.True or false: sugar is something yeast needs. (a) True (b) False
40. 40.⚖️ 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 sugar (b) size of the balloon (c) the water temperature

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