Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 495 · 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 small bottle for the yeast balloon? (a) not needed (b) needed
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month
3. 3.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a balloon (d) sugar
5. 5.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
10. 10.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) salt (d) vinegar
12. 12.True or false: time is something yeast does not need. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) salt (b) warm water (c) sunlight (d) vinegar
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it glows (d) it grows faster
16. 16.⚖️ 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 water (c) the water temperature
17. 17.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
18. 18.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a balloon (d) turmeric powder
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a small bottle (c) sugar (d) dry yeast
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) a comb (d) a battery cell
23. 23.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) a magnet (d) salt
24. 24.True or false: warm water is something yeast needs. (a) True (b) False
25. 25.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) warm water (c) turmeric powder (d) a magnet
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) dry yeast (d) a small bottle
30. 30.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) a paper clip (d) a battery cell
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a mirror (d) dry yeast
33. 33.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
34. 34.⚖️ 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
35. 35.True or false: warm water is needed for the yeast balloon. (a) True (b) False
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
37. 37.⚖️ 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) size of the balloon (d) the amount of water
38. 38.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a battery cell (d) a balloon
40. 40.True or false: sunlight is something yeast does not need. (a) False (b) True

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