Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 685 · 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.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
2. 2.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
3. 3.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke
4. 4.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
5. 5.⚖️ 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 water (b) the amount of sugar (c) the amount of yeast (d) size of the balloon
6. 6.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
7. 7.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) salt
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) turmeric powder (d) a small bottle
10. 10.🔍 Which is the odd one out? (a) sugar (b) salt (c) a magnet (d) sunlight
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.⚖️ 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 water temperature (c) the amount of water (d) the amount of yeast
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold kills sugar (d) cold slows yeast down
16. 16.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.True or false: sunlight is something yeast needs. (a) False (b) True
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a magnet (d) a balloon
19. 19.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
20. 20.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a battery cell
22. 22.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a comb (c) a small bottle (d) a balloon
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) a balloon
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
26. 26.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
28. 28.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) salt (d) a magnet
30. 30.True or false: warm water is something yeast does not need. (a) True (b) False
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) warm water (d) turmeric powder
33. 33.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
38. 38.True or false: sugar is needed for the yeast balloon. (a) False (b) True
39. 39.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a balloon (d) a paper clip

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