Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 277 · 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) sugar (b) a balloon (c) a battery cell (d) warm water
2. 2.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sugar (d) time
3. 3.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
5. 5.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
6. 6.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
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 yeast”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
9. 9.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) vinegar (d) salt
10. 10.⚖️ 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) False (b) True
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
13. 13.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) sugar (d) a balloon
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) turmeric powder (d) a mirror
17. 17.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.⚖️ 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
19. 19.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) warm water
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) dry yeast (d) a mirror
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a balloon (d) a battery cell
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of sugar
25. 25.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to make bread rise (d) to wash dishes
26. 26.True or false: vinegar is something yeast needs. (a) True (b) False
27. 27.True or false: salt is something yeast needs. (a) False (b) True
28. 28.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ 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) the water temperature (c) size of the balloon
30. 30.⚖️ 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 change it (c) we measure it
31. 31.⚖️ 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) the amount of yeast (c) size of the balloon
32. 32.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) vinegar
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) turmeric powder (d) a comb
34. 34.True or false: warm water is needed for the yeast balloon. (a) False (b) True
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) sugar (d) warm water
36. 36.True or false: a magnet is something yeast does not need. (a) True (b) False
37. 37.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
38. 38.⚖️ 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
39. 39.⚖️ 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) size of the balloon (d) the amount of yeast
40. 40.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed

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