Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 841 · 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 needed for the yeast balloon? (a) a comb (b) a paper clip (c) a magnet (d) a balloon
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) steam (d) air from outside
3. 3.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
4. 4.🔍 Which is the odd one out? (a) salt (b) warm water (c) vinegar (d) a magnet
5. 5.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
7. 7.⚖️ 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 water (b) size of the balloon (c) the water temperature
8. 8.⚖️ 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
9. 9.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) it is food for yeast (d) to colour it
10. 10.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) time (d) salt
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
12. 12.True or false: warm water is something yeast needs. (a) True (b) False
13. 13.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) time (d) a magnet
14. 14.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
15. 15.⚖️ 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) True (b) False
16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
17. 17.⚖️ 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 same bottles (b) the water temperature (c) the amount of sugar (d) the amount of water
18. 18.⚖️ 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 water (b) the amount of sugar (c) size of the balloon (d) the amount of yeast
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) dry yeast (d) warm water
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a magnet (d) turmeric powder
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a battery cell
23. 23.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
24. 24.⚖️ 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
25. 25.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
26. 26.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
28. 28.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a comb (d) a small bottle
30. 30.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.True or false: time is something yeast needs. (a) True (b) False
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
33. 33.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a comb (d) a battery cell
35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) salt
37. 37.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) a magnet (d) warm water
38. 38.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a mirror (c) a small bottle (d) dry yeast
40. 40.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water

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