Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 362 · 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.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
2. 2.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
3. 3.True or false: a comb is needed for the yeast balloon. (a) True (b) False
4. 4.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) a small bottle
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a balloon (d) sugar
7. 7.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) warm water (d) sugar
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a paper clip (d) a battery cell
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) a comb
11. 11.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a small bottle (d) a mirror
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a small bottle (d) a comb
14. 14.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a small bottle (d) dry yeast
16. 16.⚖️ 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
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
20. 20.⚖️ 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) False (b) True
21. 21.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
24. 24.⚖️ 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 measure it (c) we change it
25. 25.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
26. 26.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
29. 29.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
30. 30.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
31. 31.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
32. 32.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) time
33. 33.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.⚖️ 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
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) the amount of yeast (d) size of the balloon
39. 39.True or false: sunlight is something yeast needs. (a) False (b) True
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a paper clip (c) dry yeast (d) a small bottle

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