Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 347 · 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 mirror is not needed for the yeast balloon. (a) False (b) True
2. 2.True or false: sunlight is something yeast needs. (a) True (b) False
3. 3.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
4. 4.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
5. 5.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a small bottle (d) turmeric powder
8. 8.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
9. 9.True or false: warm water is something yeast needs. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a comb (d) sugar
15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
16. 16.⚖️ 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) the water temperature (c) size of the balloon (d) the amount of water
17. 17.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a paper clip (d) a mirror
18. 18.⚖️ 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) size of the balloon (b) the same bottles (c) the water temperature (d) the amount of sugar
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
20. 20.⚖️ 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 measure it (c) we keep it the same
21. 21.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
23. 23.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sunlight (d) sugar
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a mirror (d) a magnet
28. 28.⚖️ 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) True (b) False
29. 29.True or false: salt is something yeast does not need. (a) False (b) True
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) warm water (d) a small bottle
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
32. 32.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) turmeric powder (d) a balloon
35. 35.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
36. 36.🔍 Which is the odd one out? (a) salt (b) sugar (c) warm water (d) time
37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
38. 38.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
40. 40.⚖️ 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

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