Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 45 · 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: sugar is something yeast does not need. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
3. 3.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) sunlight
4. 4.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
5. 5.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) sugar
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) turmeric powder (d) a balloon
7. 7.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) a magnet
8. 8.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
9. 9.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.True or false: a magnet is something yeast does not need. (a) True (b) False
12. 12.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
13. 13.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it grows faster (d) it glows
14. 14.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
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 water temperature (b) the amount of sugar (c) size of the balloon (d) the amount of yeast
18. 18.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) sunlight (d) vinegar
20. 20.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a comb
22. 22.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) salt (d) a magnet
23. 23.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
24. 24.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
25. 25.🧺 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 battery cell
26. 26.⚖️ 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
27. 27.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) sunlight
28. 28.True or false: sunlight is something yeast needs. (a) False (b) True
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
31. 31.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.⚖️ 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) size of the balloon (c) the amount of yeast (d) the amount of water
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a magnet (d) warm water
35. 35.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) warm water (c) a comb (d) a mirror
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
39. 39.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
40. 40.⚖️ 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 same bottles

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