Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 477 · 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 needs? (a) salt (b) sunlight (c) warm water (d) a magnet
2. 2.True or false: warm water is something yeast does not need. (a) True (b) False
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 water”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
5. 5.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) dry yeast (d) a battery cell
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
9. 9.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
10. 10.🔍 Which is the odd one out? (a) sunlight (b) time (c) sugar (d) warm water
11. 11.True or false: sunlight is something yeast needs. (a) False (b) True
12. 12.True or false: vinegar is something yeast needs. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ 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) False (b) True
15. 15.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
17. 17.🧺 Do we need a comb 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.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) dry yeast (d) sugar
20. 20.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
21. 21.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.⚖️ 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) the amount of water (d) the amount of sugar
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
24. 24.🧺 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
25. 25.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
26. 26.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) turmeric powder (d) sugar
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a magnet (d) sugar
30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.True or false: vinegar is something yeast does not need. (a) False (b) True
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
34. 34.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
35. 35.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.True or false: a comb is needed for the yeast balloon. (a) False (b) True
37. 37.⚖️ 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 water temperature (c) the amount of yeast
38. 38.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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