Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 818 · 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 turmeric powder for the yeast balloon? (a) not needed (b) needed
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
4. 4.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) sugar (d) turmeric powder
6. 6.⚖️ 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
7. 7.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) sugar (d) dry yeast
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a comb (d) a small bottle
10. 10.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
11. 11.⚖️ 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
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
13. 13.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
14. 14.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) sugar
15. 15.⚖️ 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) the amount of water (c) size of the balloon (d) the same bottles
16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
17. 17.⚖️ 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
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) salt (d) a magnet
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.⚖️ 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 same bottles (b) the water temperature (c) the amount of yeast (d) the amount of water
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
22. 22.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
23. 23.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
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 amount of yeast (c) the water temperature
25. 25.🔍 Which is the odd one out? (a) vinegar (b) salt (c) time (d) sunlight
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) dry yeast (d) a balloon
27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
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 same bottles (c) the water temperature
30. 30.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
32. 32.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
33. 33.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) dry yeast (d) a balloon
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) sugar (d) a magnet
36. 36.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a balloon (d) sugar
39. 39.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) warm water

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