Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 907 · 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.⚖️ 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
2. 2.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
3. 3.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
4. 4.True or false: a magnet is something yeast does not need. (a) True (b) False
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a mirror (d) a balloon
6. 6.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) warm water (d) a magnet
7. 7.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
8. 8.🔍 Which is the odd one out? (a) salt (b) warm water (c) vinegar (d) sunlight
9. 9.⚖️ 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
10. 10.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
11. 11.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
12. 12.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a mirror (d) turmeric powder
14. 14.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it grows faster (d) it turns to sugar
16. 16.⚖️ 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 measure it (c) we keep it the same
17. 17.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a small bottle (c) sugar (d) a balloon
19. 19.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a battery cell (d) a magnet
20. 20.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
22. 22.True or false: a magnet is something yeast needs. (a) False (b) True
23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
24. 24.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.⚖️ 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 water temperature (c) the amount of water (d) the amount of yeast
26. 26.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) turmeric powder
28. 28.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a magnet (d) sugar
30. 30.⚖️ 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 yeast (d) the amount of sugar
31. 31.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) a magnet (d) sugar
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) warm water (d) a magnet
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
34. 34.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a comb (d) a mirror
35. 35.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
36. 36.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
37. 37.🔮 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
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) dry yeast (d) a small bottle
39. 39.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) sugar (d) time
40. 40.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed

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