Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 884 · 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.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) sugar (d) turmeric powder
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
5. 5.True or false: a magnet is something yeast does not need. (a) True (b) False
6. 6.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a magnet (d) turmeric powder
8. 8.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
9. 9.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) warm water
10. 10.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) salt (d) sunlight
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
12. 12.⚖️ 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
13. 13.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.True or false: sugar is something yeast does not need. (a) True (b) False
15. 15.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.⚖️ 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
17. 17.⚖️ 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) True (b) False
18. 18.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
19. 19.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sugar (d) time
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a mirror (d) warm water
21. 21.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
23. 23.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
24. 24.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
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) True (b) False
26. 26.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) time (d) salt
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
28. 28.⚖️ 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 water (c) the water temperature (d) size of the balloon
29. 29.⚖️ 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
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
31. 31.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
32. 32.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
33. 33.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) time (d) warm water
34. 34.⚖️ 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 sugar
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) a small bottle
36. 36.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
37. 37.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
38. 38.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
39. 39.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
40. 40.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed

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