Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 150 · 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: a magnet is not needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
3. 3.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
4. 4.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) time (d) salt
5. 5.⚖️ 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) size of the balloon (b) the amount of yeast (c) the amount of sugar (d) the water temperature
6. 6.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
7. 7.True or false: time is something yeast needs. (a) True (b) False
8. 8.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
9. 9.True or false: sugar is needed for the yeast balloon. (a) False (b) True
10. 10.⚖️ 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
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 water”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) to make it sweet (d) it is food for yeast
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) turmeric powder (d) dry yeast
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
15. 15.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
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 sugar”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
19. 19.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) sugar
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) a magnet
21. 21.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) a small bottle
23. 23.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a mirror
25. 25.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a paper clip (c) a balloon (d) warm water
27. 27.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.True or false: sugar is something yeast does not need. (a) False (b) True
30. 30.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.True or false: warm water is something yeast does not need. (a) False (b) True
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a small bottle (c) a balloon (d) dry yeast
34. 34.⚖️ 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) False (b) True
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) turmeric powder (d) a comb
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a comb (c) a small bottle (d) warm water
37. 37.⚖️ 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
38. 38.🔍 Which is the odd one out? (a) vinegar (b) time (c) sunlight (d) salt
39. 39.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) size of the balloon

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