Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 57 · 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? Which of these is the one thing we change? (a) the amount of yeast (b) the water temperature (c) the amount of sugar (d) the amount of water
2. 2.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) turmeric powder (d) a magnet
3. 3.⚖️ 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
4. 4.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a paper clip (d) a small bottle
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a mirror
7. 7.🛟 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
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
9. 9.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
10. 10.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
11. 11.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a magnet
15. 15.⚖️ 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) False (b) True
16. 16.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
17. 17.True or false: a magnet is something yeast does not need. (a) True (b) False
18. 18.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) turmeric powder (d) a mirror
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a magnet (d) a mirror
21. 21.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) steam (d) air from outside
22. 22.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a small bottle (d) turmeric powder
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) dry yeast (d) a battery cell
25. 25.True or false: salt is something yeast needs. (a) False (b) True
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a comb (d) dry yeast
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) dry yeast (d) a mirror
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a balloon (d) a mirror
29. 29.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) a magnet (d) sunlight
30. 30.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
31. 31.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
32. 32.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
33. 33.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
34. 34.⚖️ 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
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
37. 37.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) sugar (b) salt (c) time (d) warm water
39. 39.True or false: time is something yeast needs. (a) True (b) False
40. 40.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed

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