Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 70 · 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? True or false: the amount of sugar is kept the same. (a) False (b) True
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
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 change it (b) we keep it the same (c) we measure it
4. 4.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a paper clip (d) a balloon
5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
6. 6.🧺 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
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) dry yeast (d) a small bottle
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a battery cell (d) a small bottle
10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) salt
11. 11.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
12. 12.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
13. 13.True or false: salt is something yeast does not need. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) sunlight (d) vinegar
15. 15.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
16. 16.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (c) warm water (d) dry yeast
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a paper clip (d) warm water
21. 21.⚖️ 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) False (b) True
22. 22.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
23. 23.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
24. 24.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) a battery cell (d) dry yeast
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
26. 26.True or false: warm water is needed for the yeast balloon. (a) True (b) False
27. 27.⚖️ 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 yeast (c) size of the balloon (d) the same bottles
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) sugar (d) a comb
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) a magnet (d) time
32. 32.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a balloon (d) a small bottle
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a mirror (d) warm water
35. 35.True or false: time is something yeast does not need. (a) True (b) False
36. 36.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sunlight (d) warm water
38. 38.⚖️ 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 change it (c) we keep it the same
39. 39.⚖️ 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 amount of sugar (c) the amount of yeast (d) size of the balloon
40. 40.⚖️ 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

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