Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 439 · 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.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sunlight (d) sugar
2. 2.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
3. 3.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
4. 4.⚖️ 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 measure it (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 same bottles is the one thing we change. (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 amount of water”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
9. 9.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
12. 12.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) a small bottle (d) dry yeast
15. 15.⚖️ 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
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) warm water (c) dry yeast (d) a small bottle
18. 18.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
19. 19.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🍞 Which of these is something yeast needs? (a) time (b) a magnet (c) vinegar (d) salt
21. 21.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
22. 22.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a battery cell (d) a balloon
24. 24.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
25. 25.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a magnet (d) a balloon
27. 27.⚖️ 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 sugar (c) the amount of yeast (d) the amount of water
28. 28.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) a magnet
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) sugar (c) time (d) a magnet
31. 31.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.True or false: time is something yeast needs. (a) True (b) False
35. 35.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
36. 36.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) dry yeast (d) a mirror
38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
39. 39.True or false: a magnet is something yeast does not need. (a) False (b) True
40. 40.⚖️ 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

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