Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 628 · 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 is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) sugar
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
3. 3.🔮 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
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a magnet (c) dry yeast (d) sugar
5. 5.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
6. 6.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
8. 8.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
9. 9.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
13. 13.True or false: time is something yeast does not need. (a) False (b) True
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) dry yeast (d) a mirror
15. 15.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ 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) the same bottles (d) size of the balloon
17. 17.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.⚖️ 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 measure it (c) we change it
19. 19.⚖️ 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 amount of water
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a small bottle (d) a balloon
21. 21.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a battery cell
23. 23.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) vinegar (d) time
24. 24.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) time
25. 25.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) time (d) warm water
26. 26.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
27. 27.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a comb (d) a balloon
29. 29.⚖️ 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) False (b) True
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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) turmeric powder (d) dry yeast
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) warm water
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
35. 35.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) a balloon (d) dry yeast
37. 37.True or false: sunlight is something yeast needs. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.⚖️ 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) True (b) False

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