Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 243 · 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) False (b) True
2. 2.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
3. 3.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
4. 4.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) turmeric powder (d) sugar
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) dry yeast (d) a comb
7. 7.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) turmeric powder (d) warm water
9. 9.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) sugar
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a small bottle (c) dry yeast (d) a balloon
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.True or false: salt is something yeast does not need. (a) False (b) True
15. 15.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) a magnet (d) vinegar
16. 16.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
17. 17.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
18. 18.True or false: sugar is something yeast needs. (a) False (b) True
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 water temperature (b) size of the balloon (c) the amount of yeast
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a comb
21. 21.True or false: vinegar is something yeast does not need. (a) True (b) False
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
23. 23.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) a balloon (d) sugar
25. 25.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
27. 27.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
28. 28.🛟 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
29. 29.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
30. 30.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
31. 31.True or false: sunlight is something yeast needs. (a) True (b) False
32. 32.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
33. 33.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
34. 34.⚖️ 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
35. 35.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
36. 36.⚖️ 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) size of the balloon
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) salt
38. 38.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
39. 39.True or false: sugar is needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) a mirror (d) dry yeast

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