Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 569 · 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? Which of these is the one thing we change? (a) the amount of yeast (b) the same bottles (c) the water temperature (d) the amount of sugar
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
3. 3.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
5. 5.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
9. 9.True or false: warm water is needed for the yeast balloon. (a) False (b) True
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a magnet (d) a paper clip
13. 13.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
14. 14.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
15. 15.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
16. 16.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) sugar
17. 17.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
18. 18.True or false: a magnet is something yeast needs. (a) False (b) True
19. 19.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a comb (d) a battery cell
20. 20.True or false: vinegar is something yeast needs. (a) False (b) True
21. 21.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
23. 23.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) time (b) salt (c) a magnet (d) sunlight
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a comb
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) a comb (d) sugar
27. 27.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
28. 28.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.⚖️ 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
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 change it (b) we measure it (c) we keep it the same
33. 33.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) warm water (d) time
34. 34.🔮 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
35. 35.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
38. 38.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
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 what we measure. (a) True (b) False
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little

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