Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 837 · 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 of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) a paper clip (d) sugar
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
3. 3.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
5. 5.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
6. 6.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the same bottles (c) size of the balloon
9. 9.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) a magnet (d) warm water
10. 10.⚖️ 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 same bottles (c) the amount of water (d) the amount of sugar
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a small bottle (d) sugar
12. 12.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to colour rice (d) to wash dishes
13. 13.⚖️ 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
14. 14.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
15. 15.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) a small bottle (d) warm water
19. 19.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
20. 20.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) dry yeast (d) warm water
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) dry yeast (d) a mirror
23. 23.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
24. 24.⚖️ 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
25. 25.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of salt (d) a kind of stone
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) turmeric powder (d) a balloon
27. 27.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) a magnet (d) sugar
29. 29.True or false: warm water is something yeast does not need. (a) True (b) False
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) sunlight
31. 31.⚖️ 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 amount of yeast
32. 32.⚖️ 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) False (b) True
33. 33.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
34. 34.True or false: salt is something yeast needs. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a magnet (b) salt (c) time (d) sunlight
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) warm water (d) a battery cell
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.True or false: vinegar is something yeast does not need. (a) True (b) False
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a battery cell (d) dry yeast
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it

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