Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 637 · 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 sugar for the yeast balloon? (a) not needed (b) needed
2. 2.True or false: sugar is something yeast needs. (a) True (b) False
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
4. 4.⚖️ 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
5. 5.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.True or false: salt is something yeast does not need. (a) True (b) False
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) sunlight
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) size of the balloon (d) the amount of yeast
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a mirror
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.🛟 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a magnet (d) a balloon
14. 14.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) warm water (d) dry yeast
16. 16.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
17. 17.True or false: warm water is something yeast needs. (a) True (b) False
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a magnet (d) a small bottle
19. 19.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
20. 20.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
22. 22.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) warm water
24. 24.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
25. 25.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) salt (d) a magnet
26. 26.⚖️ 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 sugar
27. 27.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) time (d) salt
30. 30.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) a magnet (d) vinegar
32. 32.True or false: a magnet is something yeast needs. (a) True (b) False
33. 33.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
35. 35.⚖️ 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 amount of yeast (c) the water temperature (d) size of the balloon
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a battery cell (c) a small bottle (d) a balloon
37. 37.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold slows yeast down (d) cold kills sugar
39. 39.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
40. 40.⚖️ 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) True (b) False

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids