Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 794 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) a magnet
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
4. 4.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.⚖️ 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) True (b) False
8. 8.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
10. 10.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
11. 11.⚖️ 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) size of the balloon (c) the amount of sugar (d) the amount of water
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a magnet (d) a battery cell
14. 14.True or false: sugar is something yeast needs. (a) True (b) False
15. 15.🧺 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 battery cell
16. 16.True or false: vinegar is something yeast does not need. (a) False (b) True
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a mirror (d) a small bottle
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 amount of water (b) size of the balloon (c) the water temperature
20. 20.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
21. 21.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.⚖️ 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
23. 23.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a small bottle (d) a comb
26. 26.🔍 Which is the odd one out? (a) time (b) sunlight (c) vinegar (d) salt
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) warm water (d) a small bottle
28. 28.⚖️ 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
29. 29.True or false: a comb is needed for the yeast balloon. (a) True (b) False
30. 30.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) salt
31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
32. 32.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
33. 33.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
34. 34.⚖️ 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
35. 35.True or false: warm water is something yeast does not need. (a) True (b) False
36. 36.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.🔮 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
38. 38.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
39. 39.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
40. 40.⚖️ 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) True (b) False

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