Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 754 · 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 water temperature is what we measure. (a) True (b) False
2. 2.⚖️ 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) False (b) True
3. 3.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
4. 4.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) sugar (d) a magnet
5. 5.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
7. 7.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sugar (d) sunlight
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the same bottles (c) the amount of sugar (d) the water temperature
9. 9.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
10. 10.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
11. 11.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
13. 13.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) time (d) vinegar
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) turmeric powder (d) dry yeast
16. 16.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
17. 17.True or false: sugar is something yeast does not need. (a) True (b) False
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
19. 19.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) a magnet
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a battery cell (d) sugar
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a small bottle (d) dry yeast
22. 22.🔮 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
23. 23.🔍 Which is the odd one out? (a) sunlight (b) salt (c) vinegar (d) time
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a mirror (d) sugar
25. 25.⚖️ 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 water temperature (b) size of the balloon (c) the amount of sugar (d) the amount of yeast
26. 26.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) a small bottle (d) sugar
28. 28.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a battery cell (c) dry yeast (d) a small bottle
31. 31.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) a small bottle (d) sugar
33. 33.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.True or false: warm water is needed for the yeast balloon. (a) False (b) True
35. 35.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
36. 36.⚖️ 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 amount of sugar
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
38. 38.True or false: sunlight is something yeast needs. (a) False (b) True
39. 39.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False

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