Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 93 · 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.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.True or false: vinegar is something yeast does not need. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) vinegar (b) salt (c) a magnet (d) time
4. 4.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
5. 5.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) dry yeast (d) warm water
8. 8.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
10. 10.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) warm water (d) a magnet
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
13. 13.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
14. 14.⚖️ 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
15. 15.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
16. 16.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
17. 17.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
18. 18.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold kills sugar (d) cold water is heavy
19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a battery cell (d) warm water
22. 22.True or false: a magnet is something yeast needs. (a) False (b) True
23. 23.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
24. 24.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) sugar (c) dry yeast (d) warm water
26. 26.⚖️ 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 water temperature (c) the same bottles (d) size of the balloon
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
29. 29.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
30. 30.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.⚖️ 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
32. 32.⚖️ 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 same bottles (b) the water temperature (c) the amount of sugar (d) size of the balloon
33. 33.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) dry yeast (d) warm water
36. 36.⚖️ 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
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
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) True (b) False
40. 40.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed

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