Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 550 · 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: vinegar is something yeast does not need. (a) True (b) False
2. 2.⚖️ 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) False (b) True
3. 3.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a mirror (d) a balloon
6. 6.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
7. 7.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
8. 8.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
12. 12.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
13. 13.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) time
14. 14.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
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 change it (b) we measure it (c) we keep it the same
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) warm water (d) a balloon
18. 18.True or false: sugar is needed for the yeast balloon. (a) False (b) True
19. 19.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
22. 22.True or false: vinegar is something yeast needs. (a) False (b) True
23. 23.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) a magnet
24. 24.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.⚖️ 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 sugar (b) the amount of water (c) the water temperature (d) size of the balloon
26. 26.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
27. 27.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
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) the water temperature (b) size of the balloon (c) the amount of yeast
29. 29.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) salt (d) vinegar
30. 30.⚖️ 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
31. 31.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
32. 32.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) dry yeast (d) a paper clip
35. 35.True or false: sugar is something yeast does not need. (a) True (b) False
36. 36.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
37. 37.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
39. 39.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
40. 40.True or false: time is something yeast does not need. (a) False (b) True

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