Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 502 · 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 turmeric powder for the yeast balloon? (a) needed (b) not needed
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a small bottle (d) a balloon
3. 3.True or false: warm water is something yeast needs. (a) False (b) True
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
5. 5.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) sugar (d) a balloon
9. 9.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) a battery cell (d) a mirror
10. 10.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
11. 11.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) warm water (d) time
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a battery cell (d) a balloon
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a mirror
14. 14.⚖️ 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
15. 15.⚖️ 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 water temperature (b) the amount of yeast (c) the amount of water (d) the same bottles
16. 16.🔍 Which is the odd one out? (a) time (b) a magnet (c) sunlight (d) salt
17. 17.⚖️ 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
18. 18.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) a balloon
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a paper clip
21. 21.⚖️ 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
22. 22.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) a small bottle (d) dry yeast
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
25. 25.True or false: salt is something yeast needs. (a) True (b) False
26. 26.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a comb (d) a small bottle
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) turmeric powder
30. 30.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
31. 31.⚖️ 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) the amount of sugar (c) size of the balloon (d) the water temperature
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) a small bottle (d) dry yeast
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.True or false: sugar is something yeast needs. (a) False (b) True
36. 36.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
37. 37.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sugar (d) a magnet
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) dry yeast (d) a paper clip
39. 39.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) dry yeast

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