Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 417 · 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 water temperature is what we measure. (a) True (b) False
2. 2.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
3. 3.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
4. 4.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) warm water (d) time
5. 5.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) dry yeast (d) a comb
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a small bottle (d) sugar
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) a small bottle (d) dry yeast
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) dry yeast (d) sugar
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
12. 12.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) warm water (d) dry yeast
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a paper clip (c) dry yeast (d) a balloon
16. 16.True or false: warm water is something yeast does not need. (a) False (b) True
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.⚖️ 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) True (b) False
19. 19.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
20. 20.True or false: a magnet is something yeast needs. (a) True (b) False
21. 21.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
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 yeast”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) turmeric powder (d) sugar
24. 24.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a balloon (c) a comb (d) turmeric powder
26. 26.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the water temperature (c) the amount of sugar (d) size of the balloon
28. 28.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
29. 29.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.True or false: sugar is something yeast does not need. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) vinegar (b) salt (c) a magnet (d) time
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 water”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
34. 34.True or false: sugar is something yeast needs. (a) True (b) False
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the same bottles
36. 36.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to colour rice (d) to make bread rise
37. 37.⚖️ 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 water
38. 38.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
39. 39.True or false: a comb is needed for the yeast balloon. (a) True (b) False
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

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