Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 962 · 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) turmeric powder (c) sugar (d) a small bottle
2. 2.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
4. 4.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
5. 5.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
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 sugar”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.⚖️ 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
8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
9. 9.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
10. 10.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
14. 14.⚖️ 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 water (b) size of the balloon (c) the same bottles (d) the water temperature
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
16. 16.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
17. 17.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
18. 18.⚖️ 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
19. 19.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) a paper clip (d) dry yeast
22. 22.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.⚖️ 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 amount of sugar (c) size of the balloon
24. 24.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
25. 25.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
26. 26.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
27. 27.🔍 Which is the odd one out? (a) salt (b) warm water (c) sunlight (d) a magnet
28. 28.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
29. 29.True or false: sugar is something yeast needs. (a) False (b) True
30. 30.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) a magnet
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a magnet (d) dry yeast
32. 32.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) salt
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) sugar
34. 34.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) warm water (d) dry yeast
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) size of the balloon
37. 37.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
38. 38.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a balloon (d) a mirror
40. 40.True or false: a magnet is something yeast needs. (a) False (b) True

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