Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 616 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) sugar (d) a balloon
2. 2.🔍 Which is the odd one out? (a) a magnet (b) time (c) salt (d) vinegar
3. 3.True or false: sugar is something yeast does not need. (a) True (b) False
4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
5. 5.True or false: warm water is something yeast does not need. (a) False (b) True
6. 6.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
7. 7.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) vinegar (d) sunlight
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) a magnet
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) sugar (d) a battery cell
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) sugar (c) dry yeast (d) a balloon
11. 11.True or false: warm water is needed for the yeast balloon. (a) True (b) False
12. 12.🔮 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) dry yeast (d) a comb
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
16. 16.⚖️ 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 keep it the same (c) we change it
17. 17.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to wash dishes (d) to clean floors
18. 18.True or false: vinegar is something yeast does not need. (a) False (b) True
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a comb (d) a paper clip
20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
24. 24.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) sugar
25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
26. 26.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of water (d) the same bottles
28. 28.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
29. 29.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.⚖️ 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
32. 32.True or false: sunlight is something yeast needs. (a) True (b) False
33. 33.⚖️ 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
34. 34.⚖️ 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 yeast (c) the water temperature
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
37. 37.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
38. 38.⚖️ 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
39. 39.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
40. 40.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it

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