Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 819 · 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.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
2. 2.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of sugar
3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
4. 4.🔍 Which is the odd one out? (a) vinegar (b) salt (c) time (d) sunlight
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a comb (d) a balloon
6. 6.True or false: vinegar is something yeast does not need. (a) True (b) False
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a balloon (d) sugar
8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
9. 9.⚖️ 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) True (b) False
10. 10.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) vinegar
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) turmeric powder
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.⚖️ 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) True (b) False
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 change it (b) we keep it the same (c) we measure it
16. 16.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
17. 17.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
18. 18.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) salt
21. 21.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
23. 23.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) turmeric powder (d) a paper clip
25. 25.🔍 Which is the odd one out? (a) warm water (b) salt (c) sunlight (d) vinegar
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a comb (c) a magnet (d) turmeric powder
27. 27.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
28. 28.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
29. 29.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
30. 30.True or false: sugar is something yeast does not need. (a) False (b) True
31. 31.⚖️ 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
32. 32.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a mirror (d) a small bottle
36. 36.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
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 kept the same. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
39. 39.True or false: a comb is needed for the yeast balloon. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar

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