Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 699 · 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.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) vinegar (d) salt
2. 2.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.⚖️ 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 change it (c) we measure it
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) dry yeast (c) a balloon (d) warm water
5. 5.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a mirror (d) a paper clip
7. 7.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
8. 8.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) time
9. 9.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) dry yeast (d) sugar
11. 11.⚖️ 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 same bottles
12. 12.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
15. 15.⚖️ 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 change it (c) we measure it
16. 16.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
17. 17.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a magnet (d) a balloon
18. 18.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
19. 19.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
20. 20.⚖️ 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
21. 21.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sugar (d) sunlight
22. 22.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) sugar (d) a magnet
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a balloon (d) a mirror
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a small bottle (d) a mirror
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
30. 30.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
32. 32.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a magnet (d) a balloon
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a mirror (d) warm water
36. 36.⚖️ 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 same bottles (c) the water temperature (d) the amount of sugar
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
38. 38.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) a magnet (d) sunlight
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) dry yeast (d) a comb
40. 40.True or false: a mirror is needed for the yeast balloon. (a) True (b) False

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