Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 989 · 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 a small bottle for the yeast balloon? (a) not needed (b) needed
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a small bottle (d) a comb
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) dry yeast (d) a battery cell
5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
7. 7.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
8. 8.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
10. 10.⚖️ 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) True (b) False
11. 11.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) warm water
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a comb (d) a balloon
15. 15.True or false: salt is something yeast does not need. (a) True (b) False
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
18. 18.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to wash dishes (d) to colour rice
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
20. 20.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
22. 22.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) warm water (d) salt
23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it glows (d) it grows faster
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
25. 25.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) a small bottle
27. 27.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
28. 28.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
29. 29.⚖️ 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 sugar (b) the amount of water (c) the water temperature (d) the same bottles
30. 30.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
31. 31.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
32. 32.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a paper clip (d) a balloon
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.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
36. 36.True or false: warm water is needed for the yeast balloon. (a) False (b) True
37. 37.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of water (c) the water temperature (d) the same bottles
39. 39.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
40. 40.True or false: a magnet is something yeast needs. (a) True (b) False

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