Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 489 · 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) turmeric powder (b) sugar (c) dry yeast (d) warm water
2. 2.🔍 Which is the odd one out? (a) sunlight (b) salt (c) time (d) vinegar
3. 3.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) warm water (d) a battery cell
4. 4.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
5. 5.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
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 water”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
9. 9.⚖️ 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 yeast (c) size of the balloon (d) the water temperature
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
12. 12.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
13. 13.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
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 sugar”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a battery cell (c) warm water (d) a small bottle
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) the water temperature (c) the amount of sugar (d) the amount of water
17. 17.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) dry yeast
19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) a balloon
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a comb (d) dry yeast
23. 23.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
24. 24.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
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 what we measure. (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) a magnet (d) a balloon
27. 27.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
28. 28.⚖️ 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) True (b) False
29. 29.True or false: warm water is something yeast does not need. (a) True (b) False
30. 30.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
31. 31.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
32. 32.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold makes it pink (d) cold kills sugar
33. 33.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) a magnet (d) salt
35. 35.True or false: salt is something yeast does not need. (a) True (b) False
36. 36.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) turmeric powder (d) a mirror
37. 37.⚖️ 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) True (b) False
38. 38.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
39. 39.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
40. 40.⚖️ 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

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