Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 582 · 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 something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
2. 2.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🔮 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
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) warm water (d) a magnet
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a comb
8. 8.⚖️ 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 measure it (c) we change it
9. 9.True or false: time is something yeast does not need. (a) False (b) True
10. 10.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) warm water (d) a comb
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a battery cell (c) dry yeast (d) a small bottle
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
16. 16.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.⚖️ 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 amount of yeast (b) the water temperature (c) size of the balloon (d) the same bottles
18. 18.True or false: warm water is something yeast needs. (a) True (b) False
19. 19.⚖️ 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
20. 20.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) vinegar (d) salt
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) size of the balloon (c) the amount of yeast (d) the same bottles
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a battery cell (d) a small bottle
23. 23.True or false: vinegar is something yeast does not need. (a) True (b) False
24. 24.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a paper clip (d) turmeric powder
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) sugar (d) warm water
28. 28.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
29. 29.🔮 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
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) sugar (d) dry yeast
31. 31.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) sugar (d) a magnet
32. 32.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) time
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a battery cell (d) sugar
35. 35.True or false: time is something yeast needs. (a) True (b) False
36. 36.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
38. 38.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
39. 39.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sunlight (d) warm water
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a paper clip (d) warm water

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