Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 842 · 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.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) turmeric powder (d) a comb
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
4. 4.⚖️ 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 keep it the same (b) we measure it (c) we change it
5. 5.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a battery cell (d) a mirror
7. 7.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
8. 8.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) time (b) sunlight (c) a magnet (d) vinegar
10. 10.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
11. 11.True or false: vinegar is something yeast needs. (a) True (b) False
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) sugar (d) dry yeast
13. 13.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
14. 14.⚖️ 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 keep it the same (b) we change it (c) we measure it
15. 15.⚖️ 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
16. 16.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
18. 18.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
19. 19.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
20. 20.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) time
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) size of the balloon (d) the amount of yeast
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a balloon (d) sugar
24. 24.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) turmeric powder (d) a mirror
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) a small bottle (d) a balloon
26. 26.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a small bottle (c) warm water (d) dry yeast
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a mirror
29. 29.⚖️ 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
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a magnet is something yeast does not need. (a) True (b) False
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) sugar (d) turmeric powder
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
35. 35.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) salt (d) a magnet
36. 36.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of water
37. 37.True or false: a comb is needed for the yeast balloon. (a) True (b) False
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 amount of yeast (b) the water temperature (c) size of the balloon
39. 39.⚖️ 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 same bottles (c) the water temperature
40. 40.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed

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