Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 182 · 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.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) a comb (d) turmeric powder
3. 3.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
4. 4.⚖️ 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
5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a small bottle (d) a balloon
7. 7.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) salt
8. 8.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
9. 9.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
10. 10.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
13. 13.🍞 Which of these is something yeast does not need? (a) warm water (b) vinegar (c) sugar (d) time
14. 14.True or false: time is something yeast does not need. (a) True (b) False
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a battery cell (d) dry yeast
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) warm water (d) dry yeast
17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
18. 18.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) warm water (d) salt
19. 19.🔍 Which is the odd one out? (a) salt (b) sunlight (c) sugar (d) a magnet
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a battery cell (d) a mirror
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) size of the balloon (d) the amount of sugar
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) a balloon (d) dry yeast
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.True or false: vinegar is something yeast does not need. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ 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) True (b) False
29. 29.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) warm water (d) time
30. 30.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
32. 32.⚖️ 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) the amount of sugar (c) size of the balloon (d) the amount of yeast
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a comb (d) a small bottle
34. 34.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
35. 35.True or false: sunlight is something yeast needs. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) warm water (d) time
37. 37.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False

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