Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 163 · 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.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a battery cell (d) a balloon
3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
4. 4.True or false: sugar is needed for the yeast balloon. (a) True (b) False
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
6. 6.⚖️ 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 yeast (c) size of the balloon (d) the amount of water
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a comb (d) warm water
8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a paper clip (d) a mirror
10. 10.⚖️ 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
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a magnet (d) warm water
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.True or false: salt is something yeast does not need. (a) False (b) True
15. 15.⚖️ 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) the water temperature (c) the same bottles (d) the amount of yeast
16. 16.⚖️ 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 change it (c) we measure it
17. 17.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
18. 18.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
19. 19.⚖️ 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
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a paper clip (d) sugar
22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
23. 23.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
24. 24.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
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 what we measure. (a) True (b) False
26. 26.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
27. 27.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
30. 30.⚖️ 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 amount of sugar (c) the water temperature
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.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
33. 33.🛟 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
34. 34.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
35. 35.True or false: salt is something yeast needs. (a) True (b) False
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) a battery cell (d) a paper clip
37. 37.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
38. 38.True or false: a magnet is something yeast needs. (a) True (b) False
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) time
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False

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