Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 308 · 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 balloon is needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) warm water (d) sugar
3. 3.⚖️ 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 same bottles (b) the amount of yeast (c) the water temperature (d) the amount of water
4. 4.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) salt (b) a magnet (c) time (d) sunlight
6. 6.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
7. 7.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) salt
8. 8.⚖️ 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
9. 9.True or false: time is something yeast does not need. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar
11. 11.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a mirror (d) warm water
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
16. 16.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) turmeric powder (d) a balloon
18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) sunlight
20. 20.⚖️ 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 change it (c) we measure it
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a balloon (d) a mirror
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 measure it (b) we keep it the same (c) we change it
23. 23.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) vinegar (d) salt
24. 24.⚖️ 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) True (b) False
25. 25.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) sunlight
26. 26.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
27. 27.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
28. 28.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
29. 29.⚖️ 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
30. 30.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) sugar
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) a balloon (d) sugar
33. 33.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) warm water (d) a mirror
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) turmeric powder (d) a balloon
35. 35.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
36. 36.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
38. 38.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
39. 39.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
40. 40.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month

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