Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 834 · 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.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
2. 2.⚖️ 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 same bottles (d) the amount of water
3. 3.⚖️ 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
4. 4.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
5. 5.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) sugar
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.🔮 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
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
10. 10.⚖️ 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
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 kept the same. (a) True (b) False
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
13. 13.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) salt
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a magnet (d) a small bottle
15. 15.⚖️ 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 keep it the same (c) we measure it
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
17. 17.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
18. 18.True or false: time is something yeast needs. (a) True (b) False
19. 19.True or false: sugar is something yeast does not need. (a) False (b) True
20. 20.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) sugar (d) dry yeast
22. 22.⚖️ 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) False (b) True
23. 23.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) salt (d) a magnet
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚖️ 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
26. 26.⚖️ 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) True (b) False
27. 27.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
28. 28.⚖️ 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 amount of water (c) the water temperature
29. 29.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
30. 30.True or false: warm water is needed for the yeast balloon. (a) False (b) True
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
32. 32.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) a small bottle (d) sugar
34. 34.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a battery cell (d) a balloon
35. 35.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
36. 36.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed

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