Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 486 · 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.True or false: time is something yeast does not need. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) warm water
3. 3.⚖️ 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
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a small bottle (d) dry yeast
7. 7.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
9. 9.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
10. 10.True or false: sugar is something yeast does not need. (a) True (b) False
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
13. 13.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) a balloon (d) a small bottle
15. 15.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
16. 16.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
19. 19.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
20. 20.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
21. 21.⚖️ 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 water temperature (c) the amount of yeast
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) a balloon (d) a mirror
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a magnet (d) a battery cell
24. 24.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
25. 25.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
26. 26.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
27. 27.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) warm water (d) salt
28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
29. 29.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a small bottle (d) a battery cell
33. 33.⚖️ 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 yeast (b) the amount of sugar (c) size of the balloon (d) the same bottles
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.⚖️ 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
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) sugar
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) time
38. 38.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a comb
40. 40.True or false: warm water is something yeast does not need. (a) True (b) False

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