Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 227 · 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.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
3. 3.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) sugar
4. 4.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
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 of these is something yeast needs? (a) time (b) sunlight (c) vinegar (d) a magnet
8. 8.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) sugar (d) a small bottle
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 what we measure. (a) False (b) True
11. 11.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
12. 12.⚖️ 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 yeast (c) the water temperature (d) the amount of water
13. 13.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) time
14. 14.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
16. 16.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
18. 18.True or false: warm water is something yeast needs. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the same bottles
25. 25.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) warm water (d) a magnet
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
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) size of the balloon (b) the water temperature (c) the amount of sugar
30. 30.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
31. 31.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) sugar (c) a balloon (d) dry yeast
33. 33.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) a magnet (d) vinegar
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) a mirror
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) sunlight
39. 39.True or false: vinegar is something yeast needs. (a) True (b) False
40. 40.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it

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