Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 186 · 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) needed (b) not needed
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
4. 4.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.True or false: warm water is needed for the yeast balloon. (a) True (b) False
10. 10.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) a magnet (d) sugar
12. 12.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
13. 13.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) a magnet (d) salt
14. 14.True or false: a comb is needed for the yeast balloon. (a) True (b) False
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) sugar (d) warm water
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
18. 18.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) warm water (d) a magnet
19. 19.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
20. 20.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) warm water (d) a small bottle
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
23. 23.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) sugar
25. 25.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
26. 26.⚖️ 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 yeast (c) the same bottles (d) size of the balloon
27. 27.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) it is food for yeast (d) to make it sweet
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.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
30. 30.⚖️ 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 sugar
31. 31.⚖️ 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
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
33. 33.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) a balloon (d) sugar
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a comb (c) warm water (d) a balloon
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
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) the amount of yeast (b) size of the balloon (c) the water temperature (d) the amount of sugar
39. 39.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) vinegar (d) salt
40. 40.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) vinegar (d) time

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