Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 969 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a mirror (d) warm water
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a magnet (d) warm water
3. 3.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) a magnet (d) vinegar
4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
5. 5.⚖️ 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
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) warm water (d) a mirror
7. 7.True or false: sugar is something yeast needs. (a) False (b) True
8. 8.⚖️ 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) False (b) True
9. 9.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
10. 10.⚖️ 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
11. 11.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) a magnet
14. 14.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) sugar (d) warm water
15. 15.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
16. 16.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
18. 18.True or false: a magnet is something yeast needs. (a) False (b) True
19. 19.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
20. 20.True or false: warm water is something yeast needs. (a) False (b) True
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) a magnet (d) sugar
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
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 water temperature (b) the amount of water (c) the same bottles (d) the amount of sugar
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) sugar (d) turmeric powder
27. 27.True or false: time is something yeast does not need. (a) True (b) False
28. 28.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to make it heavy (d) to colour it
29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🍞 Does yeast need sunlight 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 kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
33. 33.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) time (d) a magnet
34. 34.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
35. 35.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
36. 36.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) sugar (d) warm water
38. 38.True or false: a comb is needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a battery cell (c) sugar (d) dry yeast
40. 40.True or false: warm water is not needed for the yeast balloon. (a) True (b) False

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