Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 348 · 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.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
2. 2.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
3. 3.⚖️ 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
4. 4.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
5. 5.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.⚖️ 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) size of the balloon (c) the water temperature
7. 7.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a paper clip (d) a battery cell
9. 9.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) it is food for yeast (d) to make it sweet
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) dry yeast (d) a balloon
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) a balloon (d) dry yeast
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
14. 14.⚖️ 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
15. 15.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
17. 17.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of sugar (d) a kind of salt
18. 18.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a mirror (d) warm water
20. 20.True or false: warm water is something yeast does not need. (a) False (b) True
21. 21.🔮 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
22. 22.⚖️ 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) False (b) True
23. 23.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
24. 24.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) turmeric powder
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
27. 27.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
28. 28.True or false: a comb is needed for the yeast balloon. (a) False (b) True
29. 29.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.⚖️ 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 yeast (c) size of the balloon (d) the amount of water
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
35. 35.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) sugar (d) a magnet
40. 40.⚖️ 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

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