Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 558 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
2. 2.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) ice cold (d) very salty
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a balloon (d) a paper clip
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
7. 7.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
8. 8.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a battery cell
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
12. 12.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
16. 16.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
17. 17.⚖️ 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 amount of water (d) the same bottles
18. 18.⚖️ 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
19. 19.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) time (d) warm water
20. 20.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) sugar
21. 21.🛟 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
22. 22.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
23. 23.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
24. 24.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a mirror
26. 26.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a small bottle (d) a comb
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 amount of water (b) size of the balloon (c) the water temperature
30. 30.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a small bottle (d) a magnet
33. 33.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a battery cell (c) a magnet (d) turmeric powder
34. 34.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
35. 35.True or false: sunlight is something yeast does not need. (a) False (b) True
36. 36.True or false: warm water is needed for the yeast balloon. (a) False (b) True
37. 37.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
38. 38.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
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