Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 577 · 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.⚖️ 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 measure it (b) we change it (c) we keep it the same
2. 2.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
3. 3.True or false: warm water is something yeast does not need. (a) False (b) True
4. 4.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold water is heavy (d) cold slows yeast down
5. 5.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.True or false: sugar is something yeast does not need. (a) True (b) False
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a battery cell (d) a small bottle
8. 8.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
9. 9.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
10. 10.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a mirror (d) a balloon
12. 12.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) dry yeast (d) a mirror
14. 14.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
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 same bottles (b) size of the balloon (c) the water temperature (d) the amount of yeast
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
18. 18.⚖️ 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
19. 19.True or false: a comb is needed for the yeast balloon. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
22. 22.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) salt
23. 23.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) salt
24. 24.True or false: time is something yeast needs. (a) False (b) True
25. 25.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a comb
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
28. 28.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a small bottle (d) a magnet
30. 30.⚖️ 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
31. 31.⚖️ 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 keep it the same (b) we change it (c) we measure it
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) time
34. 34.⚖️ 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) size of the balloon (c) the amount of water (d) the water temperature
35. 35.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
36. 36.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) time
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a magnet (d) dry yeast
38. 38.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) turmeric powder (d) a comb
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a comb (d) dry yeast

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