Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 547 · 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.True or false: salt is something yeast needs. (a) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) warm water (d) a balloon
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) warm water (d) a balloon
5. 5.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) size of the balloon (d) the amount of sugar
7. 7.⚖️ 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) True (b) False
8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
9. 9.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
10. 10.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
12. 12.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to make it sweet (d) to colour it
13. 13.⚖️ 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) True (b) False
14. 14.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) warm water (c) a small bottle (d) sugar
17. 17.⚖️ 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 change it (c) we measure it
18. 18.⚖️ 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 same bottles (c) the water temperature
19. 19.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) time (d) warm water
22. 22.⚖️ 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 water (b) the amount of sugar (c) the water temperature (d) the amount of yeast
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
24. 24.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
26. 26.⚖️ 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 amount of water (c) the water temperature
27. 27.⚖️ 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
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
30. 30.True or false: salt is something yeast does not need. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) a magnet (d) time
32. 32.⚖️ 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) False (b) True
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a paper clip (d) dry yeast
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
36. 36.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
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.True or false: warm water is something yeast needs. (a) True (b) False
39. 39.True or false: sunlight is something yeast needs. (a) False (b) True
40. 40.True or false: sugar is needed for the yeast balloon. (a) True (b) False

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