Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 388 · 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? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
3. 3.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) turmeric powder (d) a mirror
7. 7.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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 keep it the same (c) we change it
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) size of the balloon (b) the same bottles (c) the amount of yeast (d) the amount of water
10. 10.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
12. 12.True or false: time is something yeast does not need. (a) True (b) False
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a balloon (d) a mirror
15. 15.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.True or false: warm water is needed for the yeast balloon. (a) True (b) False
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.⚖️ 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) True (b) False
19. 19.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
20. 20.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sugar (d) sunlight
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
22. 22.⚖️ 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 sugar (b) the amount of water (c) size of the balloon (d) the water temperature
23. 23.🔍 Which is the odd one out? (a) a magnet (b) time (c) sunlight (d) vinegar
24. 24.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
25. 25.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
26. 26.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) dry yeast (d) turmeric powder
28. 28.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) sugar (d) a comb
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
31. 31.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a mirror (d) turmeric powder
32. 32.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
33. 33.True or false: sugar is something yeast needs. (a) False (b) True
34. 34.True or false: warm water is something yeast needs. (a) False (b) True
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) dry yeast (d) a small bottle
36. 36.True or false: salt is something yeast does not need. (a) True (b) False
37. 37.True or false: warm water is something yeast does not need. (a) False (b) True
38. 38.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True

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