Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 97 · 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.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a mirror (c) a magnet (d) a battery cell
3. 3.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
4. 4.True or false: salt is something yeast does not need. (a) False (b) True
5. 5.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.⚖️ 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 water temperature (c) the same bottles
7. 7.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
8. 8.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
9. 9.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
10. 10.⚖️ 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
11. 11.True or false: a comb is needed for the yeast balloon. (a) False (b) True
12. 12.⚖️ 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 yeast (b) the water temperature (c) size of the balloon
13. 13.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
14. 14.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a paper clip (d) dry yeast
16. 16.True or false: a mirror is 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? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.True or false: warm water is something yeast needs. (a) False (b) True
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a balloon (c) sugar (d) warm water
20. 20.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) sugar (b) salt (c) sunlight (d) vinegar
22. 22.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
23. 23.⚖️ 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 amount of sugar (d) size of the balloon
24. 24.⚖️ 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
25. 25.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) sugar (d) a small bottle
28. 28.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold makes it pink (d) cold kills sugar
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) a comb (d) a magnet
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) a balloon
31. 31.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) sugar (d) warm water
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) dry yeast (d) a small bottle
35. 35.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
36. 36.⚖️ 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 sugar (b) size of the balloon (c) the water temperature
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
38. 38.⚖️ 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
39. 39.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
40. 40.True or false: a magnet is something yeast does not need. (a) True (b) False

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