Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 292 · 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.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) salt
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a magnet
5. 5.🔍 Which is the odd one out? (a) salt (b) sugar (c) a magnet (d) sunlight
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) time
7. 7.⚖️ 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) False (b) True
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
9. 9.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
10. 10.🧺 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 balloon
11. 11.🔍 Which is the odd one out? (a) salt (b) time (c) a magnet (d) vinegar
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.⚖️ 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) size of the balloon (b) the amount of yeast (c) the amount of sugar (d) the water temperature
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
16. 16.True or false: vinegar is something yeast needs. (a) False (b) True
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a mirror (d) warm water
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) sugar
19. 19.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
21. 21.True or false: warm water is needed for the yeast balloon. (a) False (b) True
22. 22.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a balloon (c) dry yeast (d) warm water
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a paper clip (d) a balloon
25. 25.⚖️ 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
26. 26.⚖️ 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) False (b) True
27. 27.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
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 measure it (c) we keep it the same
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
31. 31.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.⚖️ 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) size of the balloon (c) the amount of yeast (d) the amount of water
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a battery cell (d) a paper clip
34. 34.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
35. 35.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) warm water
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) a balloon
37. 37.🔮 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
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
39. 39.⚖️ 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) True (b) False
40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread

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