Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 727 · 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) warm water (b) sugar (c) time (d) a magnet
2. 2.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
3. 3.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a balloon (d) a comb
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
6. 6.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) sunlight (b) salt (c) sugar (d) vinegar
8. 8.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
9. 9.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
10. 10.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
11. 11.⚖️ 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 water temperature (c) the amount of sugar (d) the amount of yeast
12. 12.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
13. 13.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) salt
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) a balloon (d) a small bottle
15. 15.⚖️ 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
16. 16.🛟 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
17. 17.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
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 yeast (b) size of the balloon (c) the water temperature (d) the amount of sugar
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) a magnet (d) a comb
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a small bottle (d) turmeric powder
21. 21.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a mirror (d) sugar
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.True or false: a magnet is something yeast needs. (a) True (b) False
26. 26.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) sunlight (d) a magnet
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) dry yeast (d) sugar
28. 28.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) time (d) sunlight
30. 30.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) a mirror
32. 32.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
33. 33.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
35. 35.⚖️ 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) False (b) True
36. 36.True or false: salt is something yeast needs. (a) True (b) False
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
39. 39.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) dry yeast (d) a battery cell

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