Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 983 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a small bottle (d) a balloon
2. 2.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
3. 3.True or false: a magnet is something yeast does not need. (a) True (b) False
4. 4.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) sugar (d) salt
6. 6.🧺 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 comb
7. 7.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) turmeric powder (d) warm water
9. 9.True or false: sugar is something yeast needs. (a) True (b) False
10. 10.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
11. 11.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a magnet (d) dry yeast
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
16. 16.⚖️ 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 water (b) size of the balloon (c) the amount of sugar (d) the water temperature
17. 17.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
18. 18.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
19. 19.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
21. 21.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
22. 22.True or false: salt is something yeast needs. (a) False (b) True
23. 23.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
24. 24.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
25. 25.⚖️ 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 amount of yeast (d) size of the balloon
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a balloon (d) a magnet
27. 27.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
28. 28.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) time
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a paper clip (d) a balloon
30. 30.True or false: a comb is needed for the yeast balloon. (a) False (b) True
31. 31.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
32. 32.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) warm water (d) sugar
33. 33.True or false: warm water is something yeast does not need. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) warm water (d) dry yeast
36. 36.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
37. 37.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) salt (d) vinegar
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
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 water”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread

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