Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 221 · 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? True or false: the same bottles is the one thing we change. (a) True (b) False
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
3. 3.⚖️ 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
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
5. 5.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) salt (d) a magnet
6. 6.⚖️ 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 measure it (c) we change it
7. 7.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
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 water temperature (b) size of the balloon (c) the amount of yeast (d) the amount of sugar
10. 10.⚖️ 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 same bottles
11. 11.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) a comb (d) a small bottle
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) sugar (d) a small bottle
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
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 water”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a small bottle (d) turmeric powder
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a small bottle (d) a magnet
18. 18.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a balloon (d) a small bottle
20. 20.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
21. 21.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) vinegar
22. 22.True or false: a magnet is something yeast needs. (a) True (b) False
23. 23.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
24. 24.🔮 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
25. 25.⚖️ 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
26. 26.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.True or false: warm water is needed for the yeast balloon. (a) True (b) False
28. 28.True or false: time is something yeast does not need. (a) False (b) True
29. 29.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) a mirror
32. 32.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
33. 33.True or false: salt is something yeast needs. (a) False (b) True
34. 34.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) warm water (d) sugar
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 same bottles (b) the amount of sugar (c) size of the balloon (d) the water temperature
37. 37.True or false: sugar is needed for the yeast balloon. (a) False (b) True
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a comb (d) a balloon
39. 39.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) salt
40. 40.⚖️ 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 sugar

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