Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 951 · 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.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
2. 2.True or false: time is something yeast needs. (a) True (b) False
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a mirror (d) a small bottle
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) warm water (d) a mirror
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
7. 7.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
8. 8.True or false: warm water is something yeast needs. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
10. 10.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) warm water (d) vinegar
12. 12.⚖️ 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 sugar (b) size of the balloon (c) the same bottles (d) the water temperature
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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 sugar (b) the same bottles (c) the water temperature (d) the amount of yeast
17. 17.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
19. 19.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
20. 20.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
21. 21.⚖️ 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 amount of water (c) size of the balloon
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.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a mirror
28. 28.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a balloon (d) a magnet
30. 30.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
31. 31.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) salt (b) time (c) vinegar (d) sunlight
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) sugar (d) dry yeast
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a battery cell (d) a balloon
35. 35.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
36. 36.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) sugar (d) a paper clip
39. 39.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed

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