Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 654 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) sugar (d) a magnet
2. 2.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
3. 3.⚖️ 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 amount of sugar (b) the same bottles (c) size of the balloon (d) the water temperature
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) warm water (d) a paper clip
5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
6. 6.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) salt
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
8. 8.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a comb (d) dry yeast
10. 10.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a paper clip (d) warm water
13. 13.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a comb (d) turmeric powder
14. 14.⚖️ 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
15. 15.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a battery cell (d) a small bottle
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
20. 20.True or false: time is something yeast needs. (a) True (b) False
21. 21.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
23. 23.⚖️ 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
24. 24.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
28. 28.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) time
29. 29.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
30. 30.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
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) the water temperature (b) size of the balloon (c) the same bottles
32. 32.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) time
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) warm water (d) dry yeast
36. 36.⚖️ 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
37. 37.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) warm water (d) time
38. 38.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
39. 39.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a comb (d) turmeric powder

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