Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 739 · 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 salt to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
3. 3.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
4. 4.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of water (c) size of the balloon (d) the amount of sugar
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) turmeric powder (d) sugar
8. 8.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
9. 9.True or false: a comb is needed for the yeast balloon. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a small bottle (d) a comb
12. 12.🔮 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) sugar (d) turmeric powder
14. 14.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
15. 15.⚖️ 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
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a battery cell (d) a comb
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) a magnet
18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
19. 19.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
20. 20.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
23. 23.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.⚖️ 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
25. 25.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a paper clip (d) dry yeast
29. 29.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
30. 30.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of yeast
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) size of the balloon (c) the amount of water
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) dry yeast (d) a balloon
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a battery cell
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
36. 36.True or false: a small bottle is not needed for the yeast balloon. (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 change it (b) we measure it (c) we keep it the same
38. 38.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
39. 39.🔮 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 bigger (d) the balloon is smaller
40. 40.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False

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