Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 968 · 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 is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
3. 3.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) dry yeast (d) a magnet
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) warm water (d) sugar
5. 5.⚖️ 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
6. 6.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
7. 7.⚖️ 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) True (b) False
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a comb (d) warm water
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
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 water”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) dry yeast (d) warm water
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
15. 15.⚖️ 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 keep it the same (c) we change it
16. 16.🔮 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
17. 17.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
18. 18.⚖️ 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 same bottles
19. 19.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
20. 20.⚖️ 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) the amount of yeast (c) size of the balloon (d) the amount of sugar
21. 21.True or false: a magnet is something yeast needs. (a) False (b) True
22. 22.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) vinegar
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) turmeric powder (d) dry yeast
26. 26.⚖️ 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
27. 27.🔍 Which is the odd one out? (a) sunlight (b) time (c) a magnet (d) vinegar
28. 28.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
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 measure it (b) we change it (c) we keep it the same
30. 30.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
31. 31.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
32. 32.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
33. 33.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
35. 35.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) salt
37. 37.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
38. 38.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
39. 39.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it

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