Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 586 · 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 something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
2. 2.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a balloon (d) a small bottle
8. 8.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
9. 9.⚖️ 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 sugar (b) the amount of water (c) size of the balloon (d) the water temperature
10. 10.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to make bread rise (d) to wash dishes
11. 11.⚖️ 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
12. 12.⚖️ 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 water (b) the amount of sugar (c) the water temperature (d) size of the balloon
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) dry yeast (d) sugar
14. 14.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
15. 15.True or false: sunlight is something yeast needs. (a) True (b) False
16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
17. 17.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
18. 18.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
19. 19.🍞 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
20. 20.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) warm water (d) dry yeast
22. 22.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a balloon (d) a magnet
24. 24.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) turmeric powder (d) sugar
26. 26.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) salt (b) a magnet (c) warm water (d) sunlight
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
30. 30.⚖️ 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
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
32. 32.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) vinegar
33. 33.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a balloon (d) dry yeast
35. 35.⚖️ 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) False (b) True
36. 36.True or false: warm water is something yeast does not need. (a) False (b) True
37. 37.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need 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 the one thing we change. (a) False (b) True
40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing

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