Yeast Balloon Experiment Worksheet

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

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