Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 399 · 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.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
2. 2.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
3. 3.True or false: sugar is not 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? True or false: the same bottles is what we measure. (a) False (b) True
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) turmeric powder
6. 6.🔍 Which is the odd one out? (a) sunlight (b) salt (c) sugar (d) vinegar
7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
8. 8.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
9. 9.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
10. 10.True or false: a magnet is something yeast needs. (a) True (b) False
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) warm water (d) a small bottle
14. 14.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
15. 15.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) warm water (d) a balloon
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) dry yeast (d) warm water
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
21. 21.True or false: warm water is something yeast needs. (a) True (b) False
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
23. 23.🔍 Which is the odd one out? (a) sunlight (b) time (c) a magnet (d) salt
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a balloon (d) dry yeast
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) dry yeast (d) sugar
28. 28.⚖️ 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 sugar (b) size of the balloon (c) the amount of yeast (d) the same bottles
29. 29.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
30. 30.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) vinegar
31. 31.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) vinegar (d) a magnet
32. 32.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
33. 33.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it turns to sugar (d) it grows faster
34. 34.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
35. 35.⚖️ 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
36. 36.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
37. 37.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
39. 39.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) warm water (d) salt
40. 40.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) warm water (d) time

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