Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 712 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
2. 2.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
3. 3.⚖️ 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
4. 4.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) dry yeast (d) warm water
6. 6.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) a small bottle (d) a magnet
7. 7.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) a paper clip (d) turmeric powder
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a mirror (d) warm water
10. 10.⚖️ 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) the same bottles (c) size of the balloon
11. 11.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
12. 12.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
14. 14.⚖️ 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 water temperature (b) the amount of sugar (c) the same bottles (d) size of the balloon
15. 15.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
17. 17.True or false: time is something yeast does not need. (a) True (b) False
18. 18.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a paper clip
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a battery cell (d) a small bottle
21. 21.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
22. 22.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a small bottle (d) a magnet
24. 24.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
27. 27.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
28. 28.⚖️ 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
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 water temperature (b) size of the balloon (c) the amount of yeast
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
31. 31.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
32. 32.True or false: warm water is something yeast needs. (a) True (b) False
33. 33.⚖️ 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
34. 34.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
35. 35.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a small bottle (c) sugar (d) warm water
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) turmeric powder
39. 39.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a balloon (d) a comb

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