Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 238 · 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: a battery cell is not needed for the yeast balloon. (a) False (b) True
2. 2.⚖️ 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
3. 3.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a mirror (d) a battery cell
5. 5.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) warm water
6. 6.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
7. 7.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
8. 8.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
10. 10.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
11. 11.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) warm water (d) sugar
12. 12.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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 same bottles (c) the amount of yeast (d) the water temperature
15. 15.True or false: sugar is something yeast needs. (a) True (b) False
16. 16.⚖️ 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
17. 17.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) a paper clip (d) dry yeast
21. 21.🔮 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
22. 22.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) a small bottle (d) dry yeast
24. 24.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) sunlight
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a comb (d) a balloon
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) a comb (d) a paper clip
29. 29.True or false: vinegar is something yeast needs. (a) False (b) True
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) a paper clip
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) a small bottle (d) a balloon
34. 34.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
35. 35.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
36. 36.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) salt (d) time
37. 37.True or false: sugar is something yeast does not need. (a) True (b) False
38. 38.⚖️ 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
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sugar (d) sunlight
40. 40.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed

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