Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 344 · 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 dry yeast for the yeast balloon? (a) needed (b) not needed
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
5. 5.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
6. 6.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
7. 7.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.⚖️ 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) size of the balloon (b) the water temperature (c) the same bottles (d) the amount of yeast
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) warm water (d) sugar
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) a small bottle (d) sugar
11. 11.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
12. 12.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) time
13. 13.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
15. 15.⚖️ 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
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 kept the same. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ 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) True (b) False
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a balloon (c) a small bottle (d) dry yeast
20. 20.⚖️ 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
21. 21.True or false: sugar is something yeast needs. (a) True (b) False
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) dry yeast
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
25. 25.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
26. 26.True or false: time is something yeast needs. (a) False (b) True
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a comb (d) a balloon
30. 30.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) vinegar
31. 31.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of water (d) the amount of sugar
34. 34.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) a small bottle (d) warm water
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: size of the balloon is the one thing we change. (a) False (b) True
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
40. 40.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam

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