Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 624 · 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.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a small bottle (d) turmeric powder
3. 3.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
4. 4.⚖️ 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) the water temperature (c) the same bottles (d) size of the balloon
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) a balloon (d) sugar
6. 6.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🔍 Which is the odd one out? (a) sugar (b) salt (c) sunlight (d) vinegar
8. 8.⚖️ 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
9. 9.True or false: a magnet is something yeast does not need. (a) False (b) True
10. 10.True or false: sugar is something yeast needs. (a) False (b) True
11. 11.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
12. 12.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
14. 14.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
15. 15.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a battery cell (d) warm water
17. 17.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
18. 18.True or false: salt is something yeast needs. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
20. 20.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to make bread rise (d) to wash dishes
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
22. 22.True or false: sunlight is something yeast does not need. (a) True (b) False
23. 23.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
25. 25.⚖️ 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) size of the balloon (b) the same bottles (c) the water temperature (d) the amount of water
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a mirror (d) dry yeast
29. 29.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
30. 30.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) a magnet (d) salt
31. 31.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.⚖️ 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 amount of sugar (c) the water temperature
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) warm water (d) a small bottle
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
36. 36.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a comb (d) turmeric powder
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a balloon (d) sugar
40. 40.🔮 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

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