Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 874 · 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 needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) warm water (d) a battery cell
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
3. 3.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
4. 4.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) turmeric powder
6. 6.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
8. 8.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
9. 9.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
10. 10.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
11. 11.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) time
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) dry yeast (d) warm water
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a balloon (d) a mirror
15. 15.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🔍 Which is the odd one out? (a) sugar (b) salt (c) time (d) warm water
17. 17.True or false: sugar is something yeast does not need. (a) False (b) True
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) dry yeast (d) a paper clip
19. 19.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
20. 20.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
21. 21.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
22. 22.⚖️ 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) False (b) True
23. 23.🔮 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
24. 24.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) sugar
25. 25.⚖️ 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) the water temperature (c) size of the balloon
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a mirror (d) turmeric powder
27. 27.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
28. 28.🧺 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
29. 29.⚖️ 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 keep it the same (c) we measure it
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a small bottle (d) sugar
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 water temperature (b) the same bottles (c) size of the balloon
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) warm water (d) a balloon
33. 33.⚖️ 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
34. 34.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) turmeric powder (c) warm water (d) a balloon
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
39. 39.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a small bottle (d) a comb

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